{"id":30072,"date":"2023-08-18T12:41:58","date_gmt":"2023-03-01T04:28:26","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90php%e3%80%91php%e7%ae%80%e4%bb%8b\/"},"modified":"2025-08-12T17:24:13","modified_gmt":"2025-08-12T09:24:13","slug":"%e3%80%90php%e3%80%91php%e7%ae%80%e4%bb%8b","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90php%e3%80%91php%e7%ae%80%e4%bb%8b\/","title":{"rendered":"\u3010PHP\u3011PHP\u7b80\u4ecb"},"content":{"rendered":"

\u6458\u8981\u6211\u603b\u7ed3\u4e86PHP\u7684\u57fa\u672c\u8bed\u6cd5\uff01\u5982\u679c\u6709\u4efb\u4f55\u5efa\u8bae\uff0c\u8bf7\u52a1\u5fc5\u544a\u8bc9\u6211\u3002<\/p>\n

\u9996\u5148<\/p>\n
<?php<\/span>\r\n\/\/\u3053\u3053\u306b\u5165\u529b\u3057\u3066\u3044\u304f<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u901a\u8fc7\u8fd9\u6837\u7684\u65b9\u5f0f\uff0c\u53ef\u4ee5\u5c06\u5176\u4f5c\u4e3aPHP\u8f93\u51fa\u3002<\/p>\n
\u56de\u58f0\u6211\u5c06\u89e3\u91ca\u4e00\u4e0b\u5728PHP\u4e2d\u76f8\u5f53\u91cd\u8981\u7684echo\u51fd\u6570\u3002<\/p>\n
<?php<\/span>\r\n  echo<\/span> 'Hello world'<\/span>;<\/span> \r\n?><\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u5728echo\u540e\u4ee5\u534a\u89d2\u7a7a\u683c\u5206\u9694\u6307\u5b9a\u503c\uff0c\u90a3\u4e48\u8fd9\u4e9b\u503c\u5c06\u88ab\u8f93\u51fa\u3002\u5728php\u4e2d\uff0c\u8f93\u51fa\u610f\u5473\u7740\u5c06\u5185\u5bb9\u5199\u5165HTML\u3002<\/p>\n
\u800c\u4e14\uff0c\u5728PHP\u4e2d\uff0c\u52a1\u5fc5\u5728\u53e5\u5b50\u672b\u5c3e\u6dfb\u52a0\u5206\u53f7\uff1b\u53d8\u91cf\u88ab\u5355\u5f15\u53f7”\u6216\u53cc\u5f15\u53f7””\u5305\u56f4\u65f6\uff0c\u4f1a\u88ab\u89c6\u4e3a\u5b57\u7b26\u4e32\u6570\u636e\u8fdb\u884c\u5904\u7406\u3002\u987a\u4fbf\u63d0\u4e00\u4e0b\uff0c\u5b57\u7b26\u4e32\u6570\u636e\u5728PHP\u4e2d\u88ab\u79f0\u4e3astring\u7c7b\u578b\u3002<\/p>\n
\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u578b\u3068\u3044\u3046\u6982\u5ff5\u306f\u975e\u5e38\u306b\u5927\u5207\u306a\u306e\u3067\u5f8c\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n
\u53d8\u91cf\u53d8\u91cf\u662f\u4e00\u4e2a\u53ef\u4ee5\u6682\u65f6\u5b58\u50a8\u6570\u636e\u7684\u5bb9\u5668\u7684\u6982\u5ff5\u3002<\/p>\n
<?php<\/span>\r\n  $fruit<\/span> =<\/span> '\u308a\u3093\u3054'<\/span>;<\/span>  \u21e6<\/span>$fruit\u3068\u3044\u3046\u5909\u6570\u306e\u4e2d\u306b\u308a\u3093\u3054\u3068\u3044\u3046\u5024\u304c\u5165\u3063\u3066\u3044\u308b<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u5728PHP\u4e2d\uff0c\u9700\u8981\u5728\u53d8\u91cf\u540d\u524d\u52a0\u4e0a$\u7b26\u53f7\uff0c\u5e76\u4f7f\u7528=\u5c06\u503c\u8d4b\u7ed9\u53d8\u91cf\u3002
\n=\u7b26\u53f7\u5e76\u4e0d\u8868\u793a\u7b49\u4e8e\uff0c\u800c\u662f\u8868\u793a\u5c06\u53f3\u8fb9\u7684\u503c\u8d4b\u7ed9\u5de6\u8fb9\u7684\u53d8\u91cf\u3002<\/p>\n
\u73b0\u5728\uff0c\u8ba9\u6211\u4eec\u5c1d\u8bd5\u8f93\u51fa\u521a\u521a\u521b\u5efa\u7684\u53d8\u91cf\u3002<\/p>\n
<?php<\/span>\r\n  $fruit<\/span> =<\/span> '\u308a\u3093\u3054'<\/span>;<\/span>\r\n  echo<\/span> $fruit<\/span>;<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u6267\u884c\u8fd9\u4e2a\uff0c\u5c31\u4f1a\u53d8\u6210\u8fd9\u6837\u3002<\/p>\n
1.\u308a\u3093\u3054\r\n<\/code><\/pre>\n
\u521b\u5efa\u7684\u53d8\u91cf\u5185\u5bb9\u5df2\u7ecf\u88ab\u5c55\u5f00\u5e76\u8f93\u51fa\u4e86\u3002<\/p>\n
\u5982\u679c\u5c06\u6574\u6570int\u7c7b\u578b\u50a8\u5b58\u5728\u53d8\u91cf\u4e2d\uff0c\u5219\u53ef\u4ee5\u76f4\u63a5\u8fdb\u884c\u8ba1\u7b97\u3002<\/p>\n
<?php<\/span>\r\n $test1<\/span> =<\/span> 2<\/span>;<\/span>\r\n $test2<\/span> =<\/span> 3<\/span>;<\/span>\r\n\r\n echo<\/span> $test1<\/span>+<\/span>$test2<\/span>;<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u3053\u308c\u3092\u5b9f\u884c\u3059\u308b\u30685\u304c\u51fa\u529b\u3055\u308c\u307e\u3059\u3002
\n\u3061\u306a\u307f\u306b\u5909\u6570\u3092’\u3084”\u3067\u56f2\u3063\u3066\u3057\u307e\u3063\u3066\u306f\u30c0\u30e1\u3067\u3059\u3002\u305d\u3046\u3057\u3066\u3057\u307e\u3046\u3068\u5909\u6570\u3067\u306f\u306a\u304f\u6587\u5b57\u5217\u3068\u3057\u3066\u6271\u308f\u308c\u3066\u3057\u307e\u3044\u3001\u4e2d\u8eab\u304c\u51fa\u529b\u3055\u308c\u307e\u305b\u3093\u3002<\/p>\n
\u6a21\u578b\u7684\u6982\u5ff5\u5b58\u5728\u7740\u50cf\u4e0a\u8ff0\u4e2d\u51fa\u73b0\u7684\u7c7b\u4f3c\u4e8estring\u7c7b\u578b\u548cint\u7c7b\u578b\u7684\u201c\u578b\u201d\u8fd9\u4e2a\u6982\u5ff5\u3002<\/p>\n
<?php<\/span>\r\n  echo<\/span> 10<\/span>+<\/span>2<\/span>*<\/span>2<\/span>;<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u8fd0\u884c\u8fd9\u6bb5\u4ee3\u7801\u5c06\u8f93\u51fa\u503c\u4e3a14\u3002\u6574\u6570\u7c7b\u578bint\u53ef\u4ee5\u8fdb\u884c\u56db\u5219\u8fd0\u7b97\u3002
\n\u7136\u800c\uff0c\u5982\u679c\u7528\u5355\u5f15\u53f7\u6216\u53cc\u5f15\u53f7\u62ec\u8d77\u6765\uff0c\u5b83\u5c06\u53d8\u4e3a\u5b57\u7b26\u4e32\u7c7b\u578bstring\uff0c\u4e0d\u4f1a\u8fdb\u884c\u8ba1\u7b97\uff0c\u800c\u662f\u4f5c\u4e3a\u5b57\u7b26\u4e32\u8f93\u51fa\u3002<\/p>\n
\u5728PHP\u4e2d\uff0c\u4e3b\u8981\u67098\u79cd\u4e0d\u540c\u7c7b\u578b\u7684\u6570\u636e\u3002<\/p>\n
\u6807\u91cf\u7c7b\u578b\u6807\u91cf\u7c7b\u578b\u4e3b\u8981\u6709\u56db\u79cd<\/p>\n
\n
\u578b\u3000\u65e5\u672c\u8a9e\u578b\u3000\u82f1\u8a9e\u8aac\u660e\u6587\u5b57\u5217\u578bstring\u3000’Hello’\u3084’\u3053\u3093\u306b\u3061\u308f’\u306a\u3069\u306e\u6587\u5b57\u5217\u6574\u6570\u578binteger1\u30012\u30013\u306a\u3069\u306e\u6574\u6570\u6d6e\u52d5\u5c0f\u6570\u70b9\u578bfloat1.4\u30843.4\u306a\u3069\u306e\u5c0f\u6570\u8ad6\u7406\u578bbooleanTrue\u304bFalse<\/p>\n
\u591a\u624d\u591a\u827a\u7684\u590d\u5408\u578b\u4e3b\u8981\u5206\u4e3a\u4e24\u79cd\u7c7b\u578b<\/p>\n
\n
\u578b\u3000\u65e5\u672c\u8a9e\u578b\u3000\u82f1\u8a9e\u8aac\u660e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578bobject\u3000\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u914d\u5217\u578barray\u914d\u5217<\/p>\n
\u7279\u5225\u7c7b\u578b\u7279\u522b\u578b\u4e3b\u8981\u6709\u4e24\u79cd\u7c7b\u578b\u3002<\/p>\n
\n
\u578b\u3000\u65e5\u672c\u8a9e\u578b\u3000\u82f1\u8a9e\u8aac\u660e\u771f\u507d\u578bnull\u3000null\u30ea\u30bd\u30fc\u30b9\u578bresource\u30d5\u30a1\u30a4\u30eb\u3084\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u63a5\u7d9a\u306a\u3069<\/p>\n
\u5982\u679c
\n\u5f53\u6ee1\u8db3\u6761\u4ef6\u65f6\u6216\u8005\u5f53\u4e0d\u6ee1\u8db3\u6761\u4ef6\u65f6\uff0c\u6211\u4eec\u4f7f\u7528if\u8bed\u53e5\u6765\u8fdb\u884c\u6761\u4ef6\u5206\u652f\u3002<\/p>\n
<?php<\/span>\r\n  if<\/span> (<\/span>bool\u578b\u306e\u5024<\/span>)<\/span> {<\/span>\r\n      \u547d\u4ee4<\/span>\r\n\u3000<\/span>}<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u5f53\uff08\uff09\u5185\u7684\u503c\u4e3a\u771f\u65f6\uff0c\u547d\u4ee4\u5c06\u88ab\u6267\u884c\u3002\u73b0\u5728\u8ba9\u6211\u4eec\u5199\u4e00\u4e2a\u7b80\u5355\u7684if\u8bed\u53e5\u3002<\/p>\n
<?php<\/span>\r\n  if<\/span> (<\/span>TRUE<\/span>)<\/span> {<\/span>\r\n     echo<\/span> 'if\u6587'<\/span>;<\/span>\r\n\u3000<\/span>}<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u5f53\u8fd0\u884c\u5982\u4e0a\u6240\u793a\u7684\u4ee3\u7801\u65f6\uff0c\u7531\u4e8e\uff08\uff09\u5185\u7684\u6761\u4ef6\u4e3atrue\uff0c\u5c06\u8f93\u51faif\u8bed\u53e5\u3002<\/p>\n
<?php<\/span>\r\n  if<\/span> (<\/span>TRUE<\/span>)<\/span> {<\/span>\r\n     $x<\/span> =<\/span> 1<\/span>+<\/span>2<\/span>;<\/span>\r\n     echo<\/span> $x<\/span>;<\/span>\r\n  }<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u5728if\u8bed\u53e5\u7684{}\u4e2d\uff0c\u4e5f\u53ef\u4ee5\u8f93\u5165\u53d8\u91cf\u3002\u987a\u4fbf\u63d0\u4e00\u4e0b\uff0c\u5982\u679c\uff08\uff09\u5185\u7684\u503c\u4e3aFalse\uff0c\u5219\u8be5\u547d\u4ee4\u5c06\u88ab\u5ffd\u7565\u3002<\/p>\n
<?php<\/span>\r\n  $a<\/span> =<\/span> TRUE<\/span>;<\/span>\r\n  if<\/span> (<\/span>$a<\/span>)<\/span> {<\/span>\r\n     echo<\/span> '\u308a\u3093\u3054'<\/span>\uff1b<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u53ef\u4ee5\u5728\u62ec\u53f7\uff08\uff09\u5185\u8f93\u5165\u53d8\u91cf\u3002
\n\u800c\u4e14\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e24\u4e2a\u6574\u6570int\u7c7b\u578b\u6765\u521b\u5efa\u4e00\u4e2abool\u578b\uff0c\u4f8b\u59821<2\uff0c\u5728if\u8bed\u53e5\u7684\uff08\uff09\u5185\u3002\u8fd9\u88ab\u79f0\u4e3a\u4e8c\u5143\u8fd0\u7b97\u3002<\/p>\n
<?php<\/span>\r\n$a<\/span> =<\/span> 2<\/span>;<\/span>\r\n$b<\/span> =<\/span> 1<\/span>;<\/span>  \r\nif<\/span> (<\/span>$a<\/span>><\/span>$b<\/span>)<\/span> {<\/span>\r\n    echo<\/span> '<\/span>$a\u306f$b\u3088\u308a\u5927\u304d\u3044<\/span>\u2019<\/span>;<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
<>=%+-\u7b49\u7b26\u53f7\u88ab\u79f0\u4e3a\u6bd4\u8f83\u8fd0\u7b97\u7b26\u3002
\n\u4f8b\u5982\uff0c1==2\u662f\u4e0d\u76f8\u7b49\u7684\uff0c\u6240\u4ee5\u7ed3\u679c\u662fFalse\uff0c\u4f46\u662f\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u770b\u5230\u4e24\u8fb9\u90fd\u662fint\u7c7b\u578b\u3002\u7136\u800c\uff0c\u5728php\u4e2d\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u8fdb\u884cint\u578b\u548cstring\u578b\u7684\u6bd4\u8f83\uff0c\u4f8b\u59821==’1’\u3002
\n\u8ba9\u6211\u4eec\u4f7f\u7528\u540d\u4e3avar_dump\u7684\u51fd\u6570\u6765\u67e5\u770b\u5b83\u5c06\u53d8\u6210\u4ec0\u4e48\u7c7b\u578b\u3002<\/p>\n
bool(true)\r\n<\/code><\/pre>\n
\u9019\u6a23\u7684\u60c5\u6cc1\u4e0b\uff0c1 == ‘1’\u6703\u8fd4\u56de true\u3002\u57fa\u672c\u4e0a\uff0c\u4e0d\u5efa\u8b70\u9032\u884c\u4e0d\u540c\u578b\u5225\u7684\u6bd4\u8f03\uff0c\u4f8b\u5982\u6578\u503c\u548c\u5b57\u7b26\u4e32\u7684\u6bd4\u8f03\u3002
\n\u9019\u662f\u56e0\u70ba\u5b58\u5728\u4e00\u7a2e\u7a31\u70ba\u96b1\u5f0f\u985e\u578b\u8f49\u63db\u7684\u6a5f\u5236\u3002
\n\u53e6\u5916\uff0c\u9084\u5b58\u5728\u4e00\u7a2e\u56b4\u683c\u6bd4\u8f03\u7684\u65b9\u5f0f\uff0c\u4f8b\u5982 1 === 1\uff0c\u4f7f\u7528\u4e09\u500b\u7b49\u865f\u9032\u884c\u56b4\u683c\u6bd4\u8f03\u3002
\n=== \u4e0d\u6703\u57f7\u884c\u96b1\u5f0f\u985e\u578b\u8f49\u63db\uff0c\u4e14\u5169\u908a\u7684\u578b\u5225\u5fc5\u9808\u76f8\u540c\uff0c\u56e0\u6b64\u63a8\u85a6\u4f7f\u7528 === \u800c\u4e0d\u662f ==\u3002<\/p>\n
<?php<\/span>\r\n  $x<\/span> =<\/span> 4<\/span>;<\/span>\r\n  if<\/span>(<\/span>$x<\/span> >=<\/span> 0<\/span>)<\/span> {<\/span>\r\n     echo<\/span> '\u30d7\u30e9\u30b9'<\/span>;<\/span>\r\n  }<\/span> else<\/span> {<\/span>\r\n     echo<\/span> '\u30de\u30a4\u30ca\u30b9'<\/span>;<\/span>\r\n  }<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u6267\u884c\u6b64\u4ee3\u7801\u4f1a\u8f93\u51fa\u4e00\u4e2a\u52a0\u53f7\u3002\u5728\u6b64\u5904\u51fa\u73b0\u4e86\u201celse\u201d\u7684\u60c5\u51b5\uff0c\u4f46\u662f\u53ea\u6709\u5728if\u8bed\u53e5\u7684\uff08\uff09\u5185\u4e3aFalse\u65f6\uff0c\u624d\u4f1a\u6267\u884celse\u4e2d\u7684\u4ee3\u7801\u3002
\n\u6839\u636e\u4e0a\u8ff0\u60c5\u51b5\uff0c\u7531\u4e8eif\u7684\u7b2c\u4e00\u4e2a\u6761\u4ef6\u4e3a\u771f\uff0c\u6240\u4ee5else\u6ca1\u6709\u88ab\u6267\u884c\u3002
\n\u63a5\u4e0b\u6765\uff0c\u8ba9\u6211\u4eec\u770b\u770b\u6709\u4e09\u4e2a\u6761\u4ef6\u7684\u60c5\u51b5\u3002<\/p>\n
<?php<\/span>\r\n  $x<\/span> =<\/span> 4<\/span>;<\/span>\r\n  if<\/span>(<\/span>$x<\/span> ><\/span> 0<\/span>)<\/span> {<\/span>\r\n     echo<\/span> '\u30d7\u30e9\u30b9'<\/span>;<\/span>\r\n  }<\/span> elseif<\/span>(<\/span>$x<\/span> <<\/span> 0<\/span>)<\/span> {<\/span>\r\n     echo<\/span> '\u30de\u30a4\u30ca\u30b9'<\/span>;<\/span>\r\n\u3000<\/span>}<\/span> else<\/span> {<\/span>\r\n     echo<\/span> '\u30bc\u30ed'<\/span>;<\/span>\r\n\u3000<\/span>}<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u901a\u8fc7\u4f7f\u7528elseif\u8bed\u53e5\uff0c\u53ef\u4ee5\u5b9e\u73b0\u4efb\u610f\u6570\u91cf\u7684\u6761\u4ef6\u5206\u652f\u3002\u9996\u5148\uff0c\u5728if\u8bed\u53e5\u4e2d\uff0c\u5982\u679c\u6761\u4ef6\u4e3atrue\uff0c\u5219\u8f93\u51fa\u6b63\u6570\uff1b\u5982\u679c\u6761\u4ef6\u4e3afalse\uff0c\u5219\u4f1a\u6267\u884celseif\u8bed\u53e5\u5e76\u8f93\u51fa\u8d1f\u6570\u3002\u8fdb\u4e00\u6b65\u5730\uff0c\u5982\u679celseif\u8bed\u53e5\u6761\u4ef6\u4e3afalse\uff0c\u5219\u8f93\u51faelse\u8bed\u53e5\u4e2d\u7684\u96f6\u3002
\n\u6b63\u56e0\u4e3a\u5982\u4e0a\u4f8b\u6240\u793a\uff0c\u65e0\u8bba\u6709\u591a\u5c11\u6761\u4ef6\uff0c\u53ea\u4f1a\u6709\u4e00\u4e2a\u6761\u4ef6\u4e3atrue\u4e14\u88ab\u6267\u884c\u3002<\/p>\n
if\u8bed\u53e5\u53ef\u4ee5\u5199\u6210\u53cc\u91cd\u7684\uff0c\u867d\u7136\u6709\u70b9\u590d\u6742\u3002<\/p>\n
<?php<\/span>\r\n $x<\/span> =<\/span> 1<\/span>;<\/span>\r\n if<\/span> (<\/span>$x<\/span> ><\/span> 0<\/span>)<\/span> {<\/span>\r\n    if<\/span> (<\/span>$x<\/span> %<\/span> 2<\/span> ===<\/span> 0<\/span>)<\/span> {<\/span>\r\n       echo<\/span> '\u6b63\u306e\u5076\u6570'<\/span>;<\/span>\r\n\u3000\u3000<\/span>}<\/span> else<\/span> {<\/span>\r\n       echo<\/span> '\u6b63\u306e\u5947\u6570'<\/span>;<\/span>\r\n\u3000\u3000<\/span>}<\/span>\r\n }<\/span> elseif<\/span> (<\/span>$x<\/span> <<\/span> 0<\/span>)<\/span> {<\/span>\r\n    if<\/span> (<\/span>$x<\/span> %<\/span> 2<\/span> ===<\/span> 0<\/span>)<\/span> {<\/span>\r\n       echo<\/span> '\u8ca0\u306e\u5076\u6570'<\/span>;<\/span>\r\n\u3000\u3000<\/span>}<\/span> else<\/span> {<\/span>\r\n       echo<\/span> '\u8ca0\u306e\u5947\u6570'<\/span>;<\/span>\r\n\u3000\u3000<\/span>}<\/span>\r\n }<\/span> else<\/span> {<\/span>\r\n       echo<\/span> '\u30bc\u30ed'<\/span>;<\/span>\r\n }<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u6267\u884c\u4e0a\u8ff0\u64cd\u4f5c\u4f1a\u8f93\u51fa\u6b63\u5947\u6570\u3002<\/p>\n
\u8fde\u7eed\u6570\u7ec4
\n\u5173\u8054\u6570\u7ec4\u662f\u4e00\u79cd\u6570\u636e\u7c7b\u578b\uff0c\u53ef\u4ee5\u5c06\u4e00\u4e2a\u503c\u4e0e\u53e6\u4e00\u4e2a\u503c\u76f8\u5173\u8054\u5e76\u4fdd\u6301\u3002\u5b83\u4e5f\u88ab\u79f0\u4e3a\u952e\u503c\u5bf9\u7c7b\u578b\u3002\u5176\u4e2d\u4e00\u4e2a\u503c\u88ab\u79f0\u4e3a\u952e\uff08key\uff09\uff0c\u53e6\u4e00\u4e2a\u503c\u88ab\u79f0\u4e3a\u503c\uff08value\uff09\u3002\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e2a\u952e\u6765\u63d0\u53d6\u5bf9\u5e94\u7684\u503c\u3002<\/p>\n
<?php<\/span>\r\n \u3000<\/span>$fruit<\/span> =<\/span> array<\/span> (<\/span>\r\n      'apple'<\/span> =><\/span> '\u308a\u3093\u3054'<\/span>,<\/span>\r\n\u3000\u3000\u3000<\/span> 'orange'<\/span> =><\/span> '\u30aa\u30ec\u30f3\u30b8'<\/span>\r\n\u3000\u3000<\/span>);<\/span>\r\n   echo<\/span> $fruit<\/span> [<\/span>'apple'<\/span>];<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u5728\u4e0a\u8ff0\u7684\u4f8b\u5b50\u4e2d\uff0c”apple” \u662f\u952e(key)\uff0c”\u308a\u3093\u3054” \u662f\u503c(value)\u3002\u901a\u8fc7\u6307\u5b9a\u952e(“apple”)\uff0c\u6211\u4eec\u53ef\u4ee5\u5728`echo`\u4e2d\u8f93\u51fa\u503c(“\u308a\u3093\u3054”)\u3002<\/p>\n
\u60a8\u8fd8\u53ef\u4ee5\u5411\u5173\u8054\u6570\u7ec4\u4e2d\u6dfb\u52a0\u503c\u3002<\/p>\n
<?php<\/span>\r\n  $fruit<\/span> =<\/span> array<\/span> (<\/span>\r\n      'apple'<\/span> =><\/span> '\u308a\u3093\u3054'<\/span>,<\/span>\r\n\u3000\u3000\u3000<\/span> 'orange'<\/span> =><\/span> '\u30aa\u30ec\u30f3\u30b8'<\/span>;<\/span>\r\n\u3000\u3000<\/span>);<\/span>\r\n\u3000<\/span>$fruit<\/span> [<\/span>'greap'<\/span>]<\/span> =<\/span> '\u3076\u3069\u3046'<\/span>;<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u901a\u8fc7\u8fd9\u6837\u505a\uff0c\u5c06\u5411\u540d\u4e3a$fruit\u7684\u5173\u8054\u6570\u7ec4\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u540d\u4e3agreap\u7684\u952e\u548c\u4e00\u4e2a\u540d\u4e3a\u3076\u3069\u3046\u7684\u503c\u3002<\/p>\n
\u57fa\u672c\u4e0a\uff0c\u6700\u597d\u6307\u5b9a\u6574\u6570\u6216\u5b57\u7b26\u4e32\u4f5c\u4e3a\u952e\u3002\u5982\u679c\u662f\u5176\u4ed6\u7c7b\u578b\uff0c\u53ef\u80fd\u4f1a\u8fdb\u884c\u9690\u5f0f\u7c7b\u578b\u8f6c\u6362\uff0c\u6216\u8005\u4f1a\u51fa\u73b0\u9519\u8bef\u3002<\/p>\n
\u5173\u8054\u6570\u7ec4\u53ef\u4ee5\u7701\u7565\u952e\u548c=>\u8fdb\u884c\u5199\u5165\u3002<\/p>\n
<?php<\/span>\r\n  $fruit<\/span> =<\/span> array<\/span> (<\/span>'miura'<\/span>,<\/span>'kudou'<\/span>,<\/span>'simizu'<\/span>,<\/span>'okada'<\/span>);<\/span>      \r\n?><\/span>\r\n<\/code><\/pre>\n
\u8ba9\u6211\u4eec\u6309\u7167\u4e0a\u8ff0\u65b9\u5f0f\u6765\u5199\uff0c\u4ece\u5de6\u5230\u53f3\u4f9d\u6b21\u5206\u914d\u4ece0\u5f00\u59cb\u7684\u8fde\u7eed\u7f16\u53f7\uff0c\u8fd9\u5c06\u6210\u4e3a\u952e\uff08key\uff09\u3002\u8fd9\u79cd\u5f62\u5f0f\u88ab\u79f0\u4e3a\u6570\u7ec4\uff0c\u4f46\u51c6\u786e\u6765\u8bf4\u662f\u5173\u8054\u6570\u7ec4\u3002\u8ba9\u6211\u4eec\u7528var_dump\u6765\u67e5\u770b\u8fd9\u4e2a\u6570\u7ec4\u3002<\/p>\n
array(4) {[0]=>string(5)miura [1]=>string(5)kudou [2]=>string(6)simizu [3]=>string(5)okada}\r\n<\/code><\/pre>\n
\u53ef\u4ee5\u770b\u51fa\uff0cMiura\u6309\u7167\u4ece0\u5f00\u59cb\u7684\u8fde\u7eed\u7f16\u53f7\u987a\u5e8f\u6392\u5217\u3002<\/p>\n
\u987a\u4fbf\u63d0\u4e00\u4e0b\uff0c\u6570\u7ec4\u548c\u5173\u8054\u6570\u7ec4\u7684\u7f16\u5199\u65b9\u5f0f\u4f7f\u7528\u4e86array\u7684\u5f62\u5f0f\uff0c\u4f46\u4e5f\u63d0\u4f9b\u4e86\u4e00\u79cd\u4f7f\u7528[]\u7b26\u53f7\u6765\u7b80\u5316\u8868\u793a\u503c\u7684\u8bed\u6cd5\u7ed3\u6784\u3002<\/p>\n
for\u5faa\u73af\u5f53\u6211\u4eec\u60f3\u8981\u6267\u884c\u91cd\u590d\u64cd\u4f5c\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528for\u5faa\u73af\u3002\u4e3a\u4e86\u66f4\u597d\u5730\u7406\u89e3\uff0c\u6211\u5c06\u7ed9\u51fa\u4e00\u4e2a\u5177\u4f53\u793a\u4f8b\u3002<\/p>\n
<?php<\/span>\r\n  for<\/span> (<\/span>$i<\/span> =<\/span> 0<\/span>;<\/span> $i<\/span> <<\/span> 10<\/span>;<\/span> $i<\/span>++<\/span>)<\/span> {<\/span>\r\n      echo<\/span> '\u3053\u3093\u306b\u3061\u306f'<\/span>;<\/span>\r\n  }<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u5f53\u6267\u884c\u5b83\u65f6\uff0c”\u4f60\u597d” \u5c06\u88ab\u8f93\u51fa\u5341\u6b21\u3002\u5f53\u6211\u4eec\u5e0c\u671b\u91cd\u590d\u76f8\u540c\u7684\u64cd\u4f5c\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528 for \u5faa\u73af\u3002
\n\u63a5\u4e0b\u6765\uff0c\u6211\u5c06\u89e3\u91ca\u4e00\u4e0b for \u5faa\u73af\u7684\u7ed3\u6784\u3002<\/p>\n
<?php<\/span>\r\n  for<\/span> (<\/span>\u521d\u671f\u5316\u51e6\u7406<\/span>;<\/span> \u7d99\u7d9a\u6761\u4ef6<\/span>;<\/span> \u66f4\u65b0\u51e6\u7406<\/span>)<\/span> {<\/span>\r\n\u3000\u3000\u3000\u3000<\/span>\/\/ \u51e6\u7406<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u5728\u5faa\u73af\u5904\u7406\u5f00\u59cb\u4e4b\u524d\uff0c\u53ea\u4f1a\u8c03\u7528\u4e00\u6b21\u7684\u662f\u521d\u59cb\u5316\u5904\u7406\u8fc7\u7a0b\u3002\u8fd9\u662f\u4e00\u4e2a\u53d8\u91cf\u3002
\n\u7136\u540e\u7ee7\u7eed\u6761\u4ef6\u4f7f\u7528\u5e03\u5c14\u7c7b\u578b\u3002\u53ea\u8981\u7ee7\u7eed\u6761\u4ef6\u4e3atrue\uff0c\u5c31\u4f1a\u6267\u884c\u5faa\u73af\u5904\u7406\u3002\u5f53\u7ee7\u7eed\u6761\u4ef6\u7684\u503c\u53d8\u4e3afalse\u65f6\uff0c\u5faa\u73af\u5904\u7406\u5c06\u505c\u6b62\u3002
\n\u5728for\u5faa\u73af\u7684\u6bcf\u6b21\u5faa\u73af\u5904\u7406\u7ed3\u675f\u4e4b\u540e\uff0c\u4f1a\u8c03\u7528\u66f4\u65b0\u5904\u7406\u8fc7\u7a0b\u3002<\/p>\n
\u5728\u524d\u9762\u7684for\u5faa\u73af\u4e2d\uff0c\u6bcf\u6b21\u8f93\u51fa\u201c\u3053\u3093\u306b\u3061\u306f\u201d\u65f6\u90fd\u4f1a\u8c03\u7528\u66f4\u65b0\u5904\u7406\uff0c\u5e76\u5c06\u503c\u9010\u6e10\u52a01\u7ed9$i\u3002\u5f53$i\u8fbe\u523010\u65f6\uff0c\u7ee7\u7eed\u6761\u4ef6\u4e0d\u518d\u6ee1\u8db3\uff0c\u5faa\u73af\u4fbf\u505c\u6b62\u4e86\u3002<\/p>\n
\u50cf$i++\u8fd9\u6837\u7684\u5f62\u5f0f\u88ab\u79f0\u4e3a\u52a0\u6cd5\u8fd0\u7b97\u7b26\u6216\u9012\u589e\u3002<\/p>\n
$i++;\r\n$i = $i+1;\r\n$i += 1;\u3000\u3000\u21e6\u3000\u8907\u5408\u4ee3\u5165\u6f14\u7b97\u5b50\u3068\u547c\u3070\u308c\u3066\u3044\u308b\r\n<\/code><\/pre>\n
\u6709\u5f88\u591a\u4e0d\u540c\u7684\u5199\u6cd5\uff0c\u4f46\u4ee5\u4e0a\u4e09\u4e2a\u5728\u610f\u4e49\u4e0a\u662f\u76f8\u540c\u7684\u3002
\n\u867d\u7136\u5199\u6cd5\u4e0d\u540c\uff0c\u4f46\u62e5\u6709\u76f8\u540c\u610f\u601d\u7684\u88ab\u79f0\u4e3a\u8bed\u6cd5\u7cd6\u3002<\/p>\n
<?php<\/span>\r\n for<\/span> (<\/span>$i<\/span> =<\/span> 0<\/span>;<\/span> $i<\/span> <<\/span>10<\/span>;<\/span> $i<\/span>++<\/span>)<\/span> {<\/span>\r\n     $count<\/span> =<\/span> $i<\/span>;<\/span>\r\n     echo<\/span> \"<\/span>{<\/span>$count<\/span>}<\/span>\u56de\u76ee\u306e\u7e70\u308a\u8fd4\u3057\u3067\u3059\u3002\"<\/span>;<\/span>\r\n }<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u6267\u884c\u8fd9\u4e2a\u540e\u662f\u7b2c0\u6b21\u91cd\u590d\u3002\u8f93\u51fa\u7684\u662f\u7b2c1\u6b21\uff0c\u7b2c2\u6b21\u5230\u7b2c10\u6b21\u7684\u91cd\u590d\u5904\u7406\u3002
\n“\u5728\u53cc\u5f15\u53f7\u540e\u9762\u7528{}\u62ec\u8d77\u6765\u53d8\u91cf\uff0c\u5c31\u79f0\u4e3a\u53d8\u91cf\u5c55\u5f00\uff0c\u8f93\u51fa\u53d8\u91cf\u7684\u5185\u5bb9\u3002<\/p>\n
\u4e2d\u6587\u4e2d\u7684\u7ffb\u8bd1\u5982\u4e0b\uff1a
\n\u4e2d\u65ad\u548c\u7ee7\u7eed<\/p>\n
\u4e2d\u6587\u7684\u7ffb\u8bd1\u53ef\u4ee5\u662f\uff1a
\nbreak\u548ccontinue\u90fd\u662f\u7528\u6765\u63a7\u5236\u5faa\u73af\u7684\u5de5\u5177\u3002\u5f53\u6211\u4eec\u9700\u8981\u5728\u5faa\u73af\u4e2d\u95f4\u505c\u6b62\u6267\u884c\u65f6\uff0c\u6211\u4eec\u4f7f\u7528break\u3002<\/p>\n
<?php<\/span>\r\n  $int<\/span> =<\/span> array<\/span>(<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> -<\/span>5<\/span>,<\/span> 6<\/span>,<\/span> 7<\/span>,<\/span> 8<\/span>,<\/span> 9<\/span>);<\/span>\r\n   \/\/ \u914d\u5217\u306e\u8981\u7d20\u6570\u3092\u53d6\u5f97\u3059\u308b\u95a2\u6570<\/span>\r\n\u3000<\/span>$num<\/span> =<\/span> count<\/span>(<\/span>$int<\/span>);<\/span>\r\n \r\n  $message<\/span> =<\/span> '\u542b\u307e\u308c\u3066\u3044\u307e\u305b\u3093'<\/span>;<\/span>\r\n\r\n\u3000<\/span>for<\/span> (<\/span>$i<\/span> =<\/span> 0<\/span>;<\/span> $i<\/span> <<\/span> $num<\/span>;<\/span> $i<\/span>++<\/span>)<\/span> {<\/span>\r\n     $value<\/span> =<\/span> $int<\/span>[<\/span>$i<\/span>];<\/span>\r\n     if<\/span> (<\/span>$value<\/span> <<\/span> 0<\/span>)<\/span> {<\/span>\r\n        $message<\/span> =<\/span> '\u542b\u307e\u308c\u3066\u3044\u307e\u3059'<\/span>;<\/span>\r\n\u3000\u3000\u3000\u3000\u3000<\/span>break<\/span>;<\/span>\r\n     }<\/span>\r\n  }<\/span>\r\n  echo<\/span> $message<\/span>;<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u8fd9\u4e2a\u7a0b\u5e8f\u7528\u4e8e\u68c0\u67e5\u6570\u7ec4\u4e2d\u662f\u5426\u5305\u542b\u8d1f\u6570\u3002\u5c3d\u7ba1\u4e00\u773c\u5c31\u53ef\u4ee5\u770b\u51fa\u662f\u5426\u5305\u542b\u8d1f\u6570\uff0c\u4f46\u5728\u8fd9\u91cc\u6211\u4eec\u51b3\u5b9a\u4e0d\u77e5\u9053\u3002<\/p>\n
\u5982\u679c\u5728\u4e0a\u8ff0\u60c5\u51b5\u4e2d\u6709\u4e00\u4e2a\u8d1f\u6570\uff0c\u5c31\u4f1a\u505c\u6b62\u5904\u7406\u5e76\u8f93\u51fa\u201c\u5305\u542b\u201d\u3002\u5f53\u6211\u4eec\u53ea\u60f3\u77e5\u9053\u662f\u5426\u5b58\u5728\u4e00\u4e2a\u8d1f\u6570\u800c\u4e0d\u5173\u5fc3\u6709\u591a\u5c11\u4e2a\u8d1f\u6570\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528break\u6765\u907f\u514d\u518d\u6b21\u8fdb\u884c\u91cd\u590d\u5904\u7406\u3002<\/p>\n
\u5728\u5faa\u73af\u8fc7\u7a0b\u4e2d\uff0c\u5f53\u6ee1\u8db3\u67d0\u4e2a\u6761\u4ef6\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528continue\u8bed\u53e5\u6765\u8df3\u8fc7\u5f53\u524d\u64cd\u4f5c\u5e76\u8fdb\u884c\u4e0b\u4e00\u8f6e\u5faa\u73af\u5904\u7406\u3002<\/p>\n
<?php<\/span>\r\n $int<\/span> =<\/span> array<\/span>(<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>,<\/span> 6<\/span>,<\/span> 7<\/span>,<\/span> 8<\/span>,<\/span> 9<\/span>);<\/span>\r\n   \/\/ \u914d\u5217\u306e\u8981\u7d20\u6570\u3092\u53d6\u5f97\u3059\u308b\u95a2\u6570<\/span>\r\n\u3000<\/span>$num<\/span> =<\/span> count<\/span>(<\/span>$int<\/span>);<\/span>\r\n \r\n  $sum<\/span> =<\/span> 0<\/span>;<\/span>\r\n\r\n\u3000<\/span>for<\/span> (<\/span>$i<\/span> =<\/span> 0<\/span>;<\/span> $i<\/span> <<\/span> $num<\/span>;<\/span> $i<\/span>++<\/span>)<\/span> {<\/span>\r\n     $value<\/span> =<\/span> $int<\/span>[<\/span>$i<\/span>];<\/span>\r\n     if<\/span> (<\/span>$value<\/span> %<\/span> 2<\/span> ===<\/span> 1<\/span>)<\/span> {<\/span>\u3000\u3000\u21e6<\/span> \u5947\u6570\u306e\u6642<\/span>\r\n        continue<\/span>;<\/span>\u3000\u3000\u21e6<\/span> \u30b9\u30ad\u30c3\u30d7\u3057\u3066\u6b21\u3078<\/span>\r\n     }<\/span>\r\n     $sum<\/span> +=<\/span> $value<\/span>;<\/span>\u3000\u3000\u21e6<\/span> \u5076\u6570\u304c\u8db3\u3055\u308c\u3066\u3044\u304f<\/span>\r\n }<\/span>\r\n  echo<\/span> $sum<\/span>;<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u5728\u4e0a\u8ff0\u4f8b\u5b50\u4e2d\uff0c\u8fd9\u662f\u4e00\u4e2a\u8ba1\u7b97\u6570\u7ec4\u4e2d\u5076\u6570\u503c\u603b\u548c\u7684\u7a0b\u5e8f\u3002
\n\u9996\u5148\uff0c\u901a\u8fc7count\u51fd\u6570\u5c06\u6570\u7ec4\u5143\u7d20\u7684\u6570\u76ee\u8d4b\u503c\u7ed9$num\u3002\u7136\u540e\uff0c\u5c06\u6570\u7ec4\u7b2c$i\u4e2a\u503c\u8d4b\u7ed9$value\u3002
\n\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u4f7f\u7528if\u8bed\u53e5\u7f16\u5199\u7a0b\u5e8f\uff0c\u5f53$value\u662f\u5947\u6570\u65f6\uff0c\u8df3\u8fc7\u8fd9\u4e2a\u64cd\u4f5c\u5e76\u8fdb\u884c\u4e0b\u4e00\u4e2a\u64cd\u4f5c\u3002
\n\u53ea\u6709\u5076\u6570\u624d\u4f1a\u88ab\u52a0\u5165\u5230$sum\u4e2d\uff0c\u6240\u4ee5\u901a\u8fc7\u8fd9\u4e2a\u65b9\u5f0f\u53ef\u4ee5\u6c42\u5f97\u5076\u6570\u7684\u603b\u548c\u3002<\/p>\n
\u5f53\u6587
\n\u867d\u7136while\u5faa\u73af\u4e0efor\u5faa\u73af\u6267\u884c\u76f8\u540c\u7684\u91cd\u590d\u64cd\u4f5c\uff0c\u4f46while\u5faa\u73af\u6bd4for\u5faa\u73af\u66f4\u7b80\u5355\u3002<\/p>\n
<?php<\/span>\r\n while<\/span>(<\/span>\u7d99\u7d9a\u6761\u4ef6<\/span>\uff09<\/span>{<\/span>\r\n     \/\/\u3000\u51e6\u7406<\/span>\r\n }<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u4e0e for \u5faa\u73af\u7c7b\u4f3c\uff0c\u53ea\u8981\u7ee7\u7eed\u6761\u4ef6\u4e3a\u771f\uff0c\u5c31\u4f1a\u6267\u884c\u91cd\u590d\u5904\u7406\u3002<\/p>\n
<?php<\/span>\r\n \u521d\u671f\u5316\u5f0f<\/span>;<\/span>\r\n\u3000<\/span>while<\/span>(<\/span>\u7d99\u7d9a\u6761\u4ef6<\/span>\uff09<\/span>{<\/span>\r\n     \/\/\u3000\u51e6\u7406<\/span>\r\n \u3000\u3000<\/span>\u66f4\u65b0\u5f0f<\/span>\uff1b<\/span>\r\n\u3000<\/span>}<\/span> \r\n?><\/span>\r\n<\/code><\/pre>\n
\u56e0\u6b64\uff0c\u901a\u8fc7\u8bbe\u7f6e\u521d\u59cb\u503c\u548c\u66f4\u65b0\u503c\u6765\u4e0efor\u5faa\u73af\u76f8\u540c\u3002\u5982\u679c\u9700\u8981\u7f16\u5199\u590d\u6742\u7684\u521d\u59cb\u503c\u6216\u590d\u6742\u7684\u66f4\u65b0\u503c\uff0c\u5219\u4f7f\u7528while\u5faa\u73af\u66f4\u5bb9\u6613\u3002<\/p>\n
\u904d\u5386\u5faa\u73af\u5728\u9700\u8981\u9010\u4e2a\u63d0\u53d6\u5173\u8054\u6570\u7ec4\u5185\u5bb9\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528foreach\u5faa\u73af\u7ed3\u6784\u3002<\/p>\n
<?php<\/span>\r\n foreach<\/span>(<\/span>$\u9023\u60f3\u914d\u5217<\/span> as<\/span> $\u5909\u6570\u540d<\/span>)<\/span> {<\/span>\r\n      \/\/\u51e6\u7406<\/span>\r\n\u3000<\/span>}<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u901a\u8fc7\u8fd9\u6837\u7684\u5199\u6cd5\uff0c\u53ef\u4ee5\u9010\u4e2a\u63d0\u53d6\u5173\u8054\u6570\u7ec4\u4e2d\u7684\u503c\uff0c\u5e76\u5c06\u5176\u5206\u522b\u8d4b\u7ed9\u6307\u5b9a\u7684\u53d8\u91cf\uff0c\u6765\u6267\u884c\u8fd9\u4e2a\u8fc7\u7a0b\u3002<\/p>\n
<?php<\/span>\r\n $int<\/span> =<\/span> [<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>];<\/span>\r\n \r\n foreach<\/span>(<\/span>$int<\/span> as<\/span> $value<\/span>)<\/span> {<\/span>  \u21e6<\/span> $int\u306e\u5024\u304c\u9806\u756a\u306b\u53d6\u308a\u51fa\u3055\u308c\u3066$value\u306b\u4ee3\u5165\u3055\u308c\u3066\u3044\u304f<\/span>\r\n     echo<\/span> $value<\/span>;<\/span>\r\n }<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u5b9e\u9645\u4e0a\uff0c\u53ef\u4ee5\u4f7f\u7528foreach\u5faa\u73af\u66f4\u7b80\u6d01\u5730\u7f16\u5199\u7528\u4e8e\u68c0\u67e5\u662f\u5426\u5305\u542b\u8d1f\u503c\u7684\u65b9\u6cd5\uff0c\u800c\u4e0d\u662f\u4f7f\u7528\u4e4b\u524d\u7684for\u5faa\u73af\u3002<\/p>\n
<?php<\/span>\r\n $int<\/span> =<\/span> array<\/span>(<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> -<\/span>5<\/span>,<\/span> 6<\/span>,<\/span> 7<\/span>,<\/span> 8<\/span>,<\/span> 9<\/span>);<\/span>\r\n \r\n  $message<\/span> =<\/span> '\u542b\u307e\u308c\u3066\u3044\u307e\u305b\u3093'<\/span>;<\/span>\r\n\r\n\u3000<\/span>foreach<\/span>(<\/span>$int<\/span> as<\/span> $value<\/span>)<\/span> {<\/span>\r\n     if<\/span>(<\/span>$value<\/span> <<\/span> 0<\/span>)<\/span> {<\/span>\r\n        $message<\/span> =<\/span> '\u542b\u307e\u308c\u3066\u3044\u307e\u3059'<\/span>;<\/span>\r\n\u3000\u3000\u3000\u3000\u3000<\/span>break<\/span>;<\/span>\r\n     }<\/span>\r\n }<\/span>\r\n  echo<\/span> $message<\/span>;<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u6211\u8ba4\u4e3a\uff0c\u5f53\u4f60\u60f3\u8981\u4f7f\u7528\u6570\u7ec4\u7684\u503c\u8fdb\u884c\u67d0\u4e9b\u64cd\u4f5c\u65f6\uff0c\u6700\u597d\u4f7f\u7528foreach\u6765\u7f16\u5199\u3002
\n\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u63d0\u53d6\u4e86\u6570\u7ec4\u7684\u5143\u7d20\uff0c\u4f46\u5bf9\u4e8e\u5173\u8054\u6570\u7ec4\u4e5f\u53ef\u4ee5\u4f7f\u7528\u5b83\u3002<\/p>\n
<?php<\/span>\r\n $fruit<\/span> =<\/span> [<\/span>\r\n     '\u308a\u3093\u3054'<\/span> =><\/span> 3<\/span>,<\/span>\r\n     '\u3076\u3069\u3046'<\/span> =><\/span> 2<\/span>,<\/span> \r\n     '\u307f\u304b\u3093'<\/span> =><\/span> 4<\/span>\r\n ];<\/span>\r\n\r\n foreach<\/span> (<\/span>$fruit<\/span> as<\/span> $key<\/span> =><\/span> $value<\/span>)<\/span> {<\/span>\r\n     echo<\/span> \"<\/span>{<\/span>$key<\/span>}<\/span>\u306e\u500b\u6570\u306f<\/span>{<\/span>$value<\/span>}<\/span>\u3067\u3059\"<\/span>;<\/span>\r\n }<\/span>\r\n\r\n?><\/span>\r\n<\/code><\/pre>\n
\u82f9\u679c\u3001\u8461\u8404\u3001\u6a59\u5b50\u8fd9\u4e09\u4e2a\u952e\u88ab\u8d4b\u503c\u7ed9$key\uff0c\u5206\u522b\u5bf9\u5e94\u6570\u503c3\u30012\u30014\uff0c\u88ab\u8d4b\u503c\u7ed9$value\u3002<\/p>\n
\u51fd\u6570
\n\u5728\u4e2d\u6587\u4e2d\uff0c\u51fd\u6570\u662f\u6307\u7ed9\u5b9a\u4e00\u4e2a\u6570\u636e\uff0c\u7ecf\u8fc7\u5904\u7406\u540e\u8fd4\u56de\u53e6\u4e00\u4e2a\u6570\u636e\u7684\u8fc7\u7a0b\u3002\u51fd\u6570\u53c8\u5206\u4e3a\u4e24\u79cd\u7c7b\u578b\uff0c\u5206\u522b\u662f\u5185\u7f6e\u51fd\u6570\u548c\u7528\u6237\u81ea\u5b9a\u4e49\u51fd\u6570\u3002
\n\u5185\u7f6e\u51fd\u6570\u662f\u6307\u5185\u7f6e\u5728php\u4e2d\u7684\u51fd\u6570\u3002
\n\u7528\u6237\u81ea\u5b9a\u4e49\u51fd\u6570\u662f\u6307\u7531\u7a0b\u5e8f\u5458\u81ea\u5df1\u521b\u5efa\u7684\u51fd\u6570\u3002<\/p>\n
\u5c3d\u7ba1\u4e0a\u9762\u63d0\u5230\u4e86\u51e0\u4e2a\u51fd\u6570\uff0c\u4f46\u662f\u50cfcount\u6216\u8005var_dump\u8fd9\u6837\u7684\u51fd\u6570\u540e\u9762\u8981\u52a0\u62ec\u53f7\u4f20\u9012\u6570\u636e\u6765\u8c03\u7528\u51fd\u6570\u3002
\n\u8c03\u7528\u51fd\u6570\u4f7f\u7528\u51fd\u6570\u3002<\/p>\n
<?php<\/span>\r\n $x<\/span> =<\/span> -<\/span>15<\/span>;<\/span>\r\n $y<\/span> =<\/span> abs<\/span>(<\/span>$x<\/span>);<\/span>  \u21e6<\/span> abs<\/span>()<\/span>\u3068\u3044\u3046\u7d76\u5bfe\u5024\u3092\u547c\u3073\u51fa\u3059\u95a2\u6570<\/span>\r\n echo<\/span> $y<\/span>;<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u5728\u4e0a\u8ff0\u7684\u4f8b\u5b50\u4e2d\uff0c\u4f7f\u7528\u51fd\u6570abs()\u6765\u8c03\u7528\u503c\u4e3a-15\u7684\uff04x\u7684\u7edd\u5bf9\u503c\u3002
\n\u5c06\u8981\u8c03\u7528\u7684\u6570\u636e\u7684\u503c\u653e\u5165abs()\u5185\u90e8\u3002\u7136\u540e\u5c06\u8fd4\u56de\u7684\u6570\u636e\u8d4b\u7ed9\uff04y\u3002
\n\u901a\u8fc7\u8f93\u51fa\uff04y\uff0c\u53ef\u4ee5\u5f97\u5230\uff04x\u7684\u7edd\u5bf9\u503c\u7684\u7a0b\u5e8f\u3002<\/p>\n
\u4e0d\u9700\u8981\u8bb0\u4f4f\u6240\u6709\u7684\u51fd\u6570\uff0c\u4ecePHP\u5b98\u65b9\u51fd\u6570\u53c2\u8003\u624b\u518c\u4e2d\u5bfb\u627e\u81ea\u5df1\u60f3\u4f7f\u7528\u7684\u51fd\u6570\u7684\u6280\u5de7\u4e5f\u5f88\u91cd\u8981\u3002<\/p>\n
\u63a5\u4e0b\u6765\u6211\u5c06\u89e3\u91ca\u7528\u6237\u81ea\u5b9a\u4e49\u51fd\u6570\u3002<\/p>\n
<?php<\/span>\r\n function<\/span> \u95a2\u6570\u540d<\/span>(<\/span>$\u4eee\u5f15\u6570<\/span>)<\/span> {<\/span>\r\n   \/\/ \u51e6\u7406<\/span>\r\n   return<\/span> \u8fd4\u308a\u5024<\/span>;<\/span>\r\n }<\/span>\r\n \u95a2\u6570\u540d<\/span>(<\/span>$\u5b9f\u5f15\u6570<\/span>);<\/span>\u3000\u21e6<\/span> \u5909\u6570\u3060\u3051\u3067\u306f\u306a\u304f\u6570\u5024\u306a\u3069\u3067\u3082\u826f\u3044<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u4f7f\u7528function\u6765\u5b9a\u4e49\u51fd\u6570\u3002<\/p>\n
<?php<\/span>\r\n function<\/span> add<\/span>(<\/span>$x<\/span>,<\/span> $y<\/span>)<\/span> {<\/span>\r\n     $z<\/span> =<\/span> $x<\/span> +<\/span> $y<\/span>;<\/span>\r\n     return<\/span> $z<\/span>;<\/span>\r\n }<\/span>\r\n $sum<\/span> =<\/span> add<\/span>(<\/span>15<\/span>,<\/span> 6<\/span>);<\/span>\r\n echo<\/span> $sum<\/span>;<\/span>\r\n?><\/span>\r\n<\/code><\/pre>\n
\u9996\u5148\uff0c\u4f7f\u7528function\u5173\u952e\u5b57\u6765\u5b9a\u4e49\u51fd\u6570add\u3002\u6b64\u65f6\uff0c\u5f62\u5f0f\u53c2\u6570$x\u548c$y\u6ca1\u6709\u88ab\u8d4b\u503c\u3002
\n\u5c06$x\u548c$y\u7684\u603b\u548c\u8d4b\u503c\u7ed9$z\u3002\u7136\u540e\u5c06$z\u4f5c\u4e3a\u8fd4\u56de\u503c\u8fd4\u56de\u7ed9\u7528\u6237\u3002<\/p>\n
\u5b9e\u9645\u53c2\u6570\u7684\u503c15\u548c6\u5c06\u88ab\u5206\u522b\u8d4b\u7ed9\u865a\u62df\u53c2\u6570$x\u548c$y\u3002\u7136\u540e\uff0c\u8fd4\u56de\u503c$z\u7684\u503c\u5c06\u901a\u8fc7echo\u8bed\u53e5\u8f93\u51fa\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6458\u8981\u6211\u603b\u7ed3\u4e86PHP\u7684\u57fa\u672c\u8bed\u6cd5\uff01\u5982\u679c\u6709\u4efb\u4f55\u5efa\u8bae\uff0c\u8bf7\u52a1\u5fc5\u544a\u8bc9\u6211\u3002 \u9996\u5148 <?php \/\/\u3053\u3053\u306b\u5165\u529b\u3057\u3066\u3044\u304f  […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-30072","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"\n\u3010PHP\u3011PHP\u7b80\u4ecb - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u3010PHP\u3011PHP\u7b80\u4ecb\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010php\u3011php\u7b80\u4ecb\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u3010PHP\u3011PHP\u7b80\u4ecb\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8e\u3010PHP\u3011PHP\u7b80\u4ecb\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010php\u3011php\u7b80\u4ecb\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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