{"id":30304,"date":"2023-09-07T23:02:17","date_gmt":"2024-03-11T00:04:02","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8-php-%e8%bf%9b%e8%a1%8c%e8%b0%83%e6%95%b4%e5%a4%a7%e5%b0%8f\/"},"modified":"2025-08-12T18:32:57","modified_gmt":"2025-08-12T10:32:57","slug":"%e4%bd%bf%e7%94%a8-php-%e8%bf%9b%e8%a1%8c%e8%b0%83%e6%95%b4%e5%a4%a7%e5%b0%8f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8-php-%e8%bf%9b%e8%a1%8c%e8%b0%83%e6%95%b4%e5%a4%a7%e5%b0%8f\/","title":{"rendered":"\u4f7f\u7528 PHP \u8fdb\u884c\u8c03\u6574\u5927\u5c0f"},"content":{"rendered":"

\u5bf9\u56fe\u50cf\u8fdb\u884c\u9884\u5904\u7406<\/p>\n
ImageCreateFromJPEG<\/span>(<\/span>$filename<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u8fd9\u6837\u53ef\u4ee5\u5728\u5185\u5b58\uff08\u5728\u8fd9\u4e2a\u7a0b\u5e8f\u4e2d\uff09\u4e2d\u5904\u7406\u3002<\/p>\n
\u8c03\u6574\u56fe\u7247\u5c3a\u5bf8<\/p>\n
bool<\/span> imagecopyresampled<\/span>(<\/span>resource<\/span> $dst_image<\/span>,<\/span>resource<\/span> $src_image<\/span>,<\/span>\r\nint<\/span> $dst_x<\/span>,<\/span>int<\/span> $dst_y<\/span>,<\/span>int<\/span> $src_x<\/span>,<\/span>int<\/span> $src_y<\/span>,<\/span>int<\/span> \r\n$dst_w<\/span>,<\/span>int<\/span> $dst_h<\/span>,<\/span>int<\/span> $src_w<\/span>,<\/span>int<\/span> $src_h<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u53c2\u6570
\n\u76ee\u6807\u56fe\u50cf
\n\u590d\u5236\u7684\u76ee\u6807\u56fe\u50cf\u94fe\u63a5\u8d44\u6e90\u3002
\n\u6e90\u56fe\u50cf
\n\u590d\u5236\u7684\u6e90\u56fe\u50cf\u94fe\u63a5\u8d44\u6e90\u3002
\n\u76ee\u6807 x \u5750\u6807
\n\u590d\u5236\u5230\u7684\u76ee\u6807\u56fe\u50cf\u7684 x \u5750\u6807\u3002
\n\u76ee\u6807 y \u5750\u6807
\n\u590d\u5236\u5230\u7684\u76ee\u6807\u56fe\u50cf\u7684 y \u5750\u6807\u3002
\n\u6e90 x \u5750\u6807
\n\u590d\u5236\u7684\u6e90\u56fe\u50cf\u7684 x \u5750\u6807\u3002
\n\u6e90 y \u5750\u6807
\n\u590d\u5236\u7684\u6e90\u56fe\u50cf\u7684 y \u5750\u6807\u3002
\n\u76ee\u6807\u5bbd\u5ea6
\n\u590d\u5236\u5230\u7684\u76ee\u6807\u56fe\u50cf\u7684\u5bbd\u5ea6\u3002
\n\u76ee\u6807\u9ad8\u5ea6
\n\u590d\u5236\u5230\u7684\u76ee\u6807\u56fe\u50cf\u7684\u9ad8\u5ea6\u3002
\n\u6e90\u5bbd\u5ea6
\n\u590d\u5236\u7684\u6e90\u56fe\u50cf\u7684\u5bbd\u5ea6\u3002
\n\u6e90\u9ad8\u5ea6
\n\u590d\u5236\u7684\u6e90\u56fe\u50cf\u7684\u9ad8\u5ea6\u3002<\/p>\n
\u5982\u679c\u6210\u529f\uff0c\u5219\u8fd4\u56de TRUE\uff1b\u5982\u679c\u5931\u8d25\uff0c\u5219\u8fd4\u56de FALSE\u3002<\/p>\n
\u8f93\u51fa\u6216\u4fdd\u5b58\u56fe\u50cf<\/p>\n
bool<\/span> imagejpeg<\/span> (<\/span> resource<\/span> $image<\/span> [,<\/span> string<\/span> $filename<\/span> [,<\/span> int<\/span> $quality<\/span> ]]<\/span> )<\/span>\r\n<\/code><\/pre>\n
\u4f20\u5165\u53c2\u6570
\n\u56fe\u7247
\n\u6307\u5b9a\u56fe\u50cf\u8d44\u6e90\u3002<\/p>\n
\u6587\u4ef6\u540d
\n\u5f53\u5c06\u56fe\u50cf\u8d44\u6e90\u4fdd\u5b58\u5230\u6587\u4ef6\u65f6\uff0c\u8bf7\u6307\u5b9a\u6587\u4ef6\u540d\u3002
\n\u8d28\u91cf
\n\u53ef\u4ee5\u4ece0\uff08\u4f4e\u8d28\u91cf\uff09\u5230100\uff08\u9ad8\u8d28\u91cf\uff09\u6765\u6307\u5b9a\u56fe\u50cf\u7684\u8d28\u91cf\u3002\u9ed8\u8ba4\u4e3a75\u3002
\n\u8fd4\u56de\u503c
\n\u5982\u679c\u6210\u529f\u8f93\u51fa\/\u521b\u5efa\u56fe\u50cf\uff0c\u5219\u8fd4\u56detrue\uff1b\u5426\u5219\u8fd4\u56defalse\u3002<\/p>\n
\u5b9e\u9645\u4e0a\u8c03\u6574\u5927\u5c0f<\/p>\n
$filename<\/span> =<\/span> \"\u753b\u50cf\u30d1\u30b9\"<\/span>\r\nif<\/span> (<\/span>mime_content_type<\/span>(<\/span>$filename<\/span>)<\/span> ==<\/span> 'image\/jpeg'<\/span>)<\/span> {<\/span>\r\n          $image<\/span> =<\/span> ImageCreateFromJPEG<\/span>(<\/span>$filename<\/span>);<\/span>\r\n          $size<\/span> =<\/span> getimagesize<\/span>(<\/span>$filename<\/span>);<\/span>\r\n        }<\/span>else<\/span> {<\/span>\r\n          $image<\/span> =<\/span> ImageCreateFromPNG<\/span>(<\/span>$filename<\/span>);<\/span>\r\n          $size<\/span> =<\/span> getimagesize<\/span>(<\/span>$filename<\/span>);<\/span>\r\n        }<\/span>\r\n\r\n\r\n\r\n        \/\/\u767d\u7d19\u306e\u753b\u50cf\u3092\u4f5c\u6210<\/span>\r\n        $image2<\/span> =<\/span> ImageCreateTrueColor<\/span>(<\/span>640<\/span>,<\/span> 480<\/span>);<\/span>\r\n        \/\/\u30ea\u30b5\u30a4\u30ba\u51e6\u7406<\/span>\r\n        imagecopyresampled<\/span>(<\/span>$image2<\/span>,<\/span> $image<\/span>,<\/span> 0<\/span>,<\/span> 0<\/span>,<\/span> 0<\/span>,<\/span> 0<\/span>,<\/span> 640<\/span>,<\/span> 480<\/span>,<\/span> $size<\/span>[<\/span>0<\/span>],<\/span> $size<\/span>[<\/span>1<\/span>]);<\/span>\r\n\r\n        \/\/\u4fdd\u5b58<\/span>\r\n        if<\/span> (<\/span>mime_content_type<\/span>(<\/span>$filename<\/span>)<\/span> ==<\/span> 'image\/jpeg'<\/span>)<\/span> {<\/span>\r\n          imagejpeg<\/span>(<\/span>$image2<\/span>,<\/span> $filename<\/span>);<\/span>\r\n        }<\/span>else<\/span> {<\/span>\r\n          imagepng<\/span>(<\/span>$image2<\/span>,<\/span> $filename<\/span>);<\/span>\r\n        }<\/span>\r\n\r\n        \/\/\u30e1\u30e2\u30ea\u89e3\u653e<\/span>\r\n        imagedestroy<\/span>(<\/span>$image<\/span>);<\/span>\r\n<\/code><\/pre>\n
\u8c03\u6574\u5927\u5c0f\u95ee\u9898\u539f\u59cb\u5c3a\u5bf8\u4e3a\u201c\u5bbd400\u50cf\u7d20\u00d7\u9ad8180\u50cf\u7d20\u201d\uff0c\u4f46\u7531\u4e8e\u88ab\u6307\u5b9a\u4e3a\u5bbd\u5ea6\u4e3a\u201c200\u50cf\u7d20\u201d\u7684\u7ed3\u679c\uff0c\u4fdd\u6301\u7eb5\u6a2a\u6bd4\u4f8b\u540e\uff0c\u9ad8\u5ea6\u53d8\u4e3a\u201c90\u50cf\u7d20\u201d\u3002
\n\u53ea\u9700\u6307\u5b9a\u5176\u4e2d\u4e00\u4e2a\u53c2\u6570\uff0c\u5373\u53ef\u81ea\u52a8\u786e\u5b9a\u4fdd\u6301\u539f\u59cb\u56fe\u50cf\u6bd4\u4f8b\u7684\u9ad8\u5ea6\u6216\u5bbd\u5ea6\u3002<\/p>\n
width<\/span>:<\/span> auto<\/span>;<\/span>\r\n<\/code><\/pre>\n
\u8c03\u6574\u5927\u5c0f\u7684\u8ba1\u7b97\u516c\u5f0f\u5f53\u539f\u59cb\u56fe\u50cf\u7684\u5bbd\u5ea6\u4e3aX1\uff0c\u9ad8\u5ea6\u4e3aY1\u65f6\uff0c
\n\u8c03\u6574\u5c3a\u5bf8\u540e\u7684\u56fe\u50cf\u7684\u5bbd\u5ea6\u4e3aX2\uff0c\u9ad8\u5ea6\u4e3aY2\uff0c
\n\u90a3\u4e48\u5f53\u5c06X2\u8bbe\u4e3a\u4efb\u610f\u503c\u65f6\uff0c\u4fdd\u6301\u5bbd\u9ad8\u6bd4\u7684\u60c5\u51b5\u4e0b\uff0cY2\u7684\u503c\u53ef\u4ee5\u8ba1\u7b97\u4e3a\uff1a
\nY2 = (X2 \/ X1) * Y1<\/p>\n
\u5b9e\u8df5<\/p>\n
        \/\/retinadisplay\u5bfe\u5fdc<\/span>\r\n        $resize_width<\/span> =<\/span> 462<\/span> *<\/span> 2<\/span>;<\/span> \/\/\u6a2a\u5e45\u6c7a\u3081\u308b<\/span>\r\n        $resize_height<\/span> =<\/span> $resize_width<\/span> \/<\/span> $size<\/span>[<\/span>0<\/span>]<\/span> *<\/span> $size<\/span>[<\/span>1<\/span>];<\/span> \/\/\u7e26\u3092\u6bd4\u7387\u5d29\u3055\u305a\u51fa\u3059<\/span>\r\n        \/\/\u767d\u7d19\u306e\u753b\u50cf\u3092\u4f5c\u6210<\/span>\r\n        $image2<\/span> =<\/span> ImageCreateTrueColor<\/span>(<\/span>$resize_width<\/span>,<\/span> $resize_height<\/span>);<\/span>\r\n        \/\/\u30ea\u30b5\u30a4\u30ba\u51e6\u7406<\/span>\r\n        imagecopyresampled<\/span>(<\/span>$image2<\/span>,<\/span> $image<\/span>,<\/span> 0<\/span>,<\/span> 0<\/span>,<\/span> 0<\/span>,<\/span> 0<\/span>,<\/span> $resize_width<\/span>,<\/span> $resize_height<\/span>,<\/span> $size<\/span>[<\/span>0<\/span>],<\/span> $size<\/span>[<\/span>1<\/span>]);<\/span>\r\n\r\n<\/code><\/pre>\n
\u5b8c\u6210<\/p>\n
\r\nif<\/span> (<\/span>mime_content_type<\/span>(<\/span>$filename<\/span>)<\/span> ==<\/span> 'image\/jpeg'<\/span>)<\/span> {<\/span>\r\n          $image<\/span> =<\/span> ImageCreateFromJPEG<\/span>(<\/span>$filename<\/span>);<\/span>\r\n          $size<\/span> =<\/span> getimagesize<\/span>(<\/span>$filename<\/span>);<\/span>\r\n        }<\/span>else<\/span> {<\/span>\r\n          $image<\/span> =<\/span> ImageCreateFromPNG<\/span>(<\/span>$filename<\/span>);<\/span>\r\n          $size<\/span> =<\/span> getimagesize<\/span>(<\/span>$filename<\/span>);<\/span>\r\n        }<\/span>\r\n\r\n\r\n        \/\/retinadisplay\u5bfe\u5fdc<\/span>\r\n        $resize_width<\/span> =<\/span> 462<\/span> *<\/span> 2<\/span>;<\/span> \/\/\u6a2a\u5e45\u6c7a\u3081\u308b<\/span>\r\n        $resize_height<\/span> =<\/span> $resize_width<\/span> \/<\/span> $size<\/span>[<\/span>0<\/span>]<\/span> *<\/span> $size<\/span>[<\/span>1<\/span>];<\/span> \/\/\u7e26\u3092\u6bd4\u7387\u5d29\u3055\u305a\u51fa\u3059<\/span>\r\n        \/\/\u767d\u7d19\u306e\u753b\u50cf\u3092\u4f5c\u6210<\/span>\r\n        $image2<\/span> =<\/span> ImageCreateTrueColor<\/span>(<\/span>$resize_width<\/span>,<\/span> $resize_height<\/span>);<\/span>\r\n\r\n        $x<\/span> =<\/span> 0<\/span>;<\/span>\r\n        $y<\/span> =<\/span> 0<\/span>;<\/span>\r\n        $x<\/span> =<\/span> floor<\/span>((<\/span>$size<\/span>[<\/span>0<\/span>]<\/span> -<\/span> $size<\/span>[<\/span>1<\/span>])<\/span> \/<\/span> 2<\/span>);<\/span>  \/\/\u5207\u308a\u53d6\u308bx\u8ef8\u306e\u4e2d\u5fc3<\/span>\r\n        $y<\/span> =<\/span> floor<\/span>((<\/span>$size<\/span>[<\/span>1<\/span>]<\/span> -<\/span> $size<\/span>[<\/span>0<\/span>])<\/span> \/<\/span> 2<\/span>);<\/span>  \/\/\u5207\u308a\u53d6\u308bx\u8ef8\u306e\u4e2d\u5fc3<\/span>\r\n        \/\/\u30ea\u30b5\u30a4\u30ba\u51e6\u7406<\/span>\r\n        imagecopyresampled<\/span>(<\/span>$image2<\/span>,<\/span> $image<\/span>,<\/span> 0<\/span>,<\/span> 0<\/span>,<\/span> $x<\/span>,<\/span> $y<\/span>,<\/span> $resize_width<\/span>,<\/span> $resize_height<\/span>,<\/span> $size<\/span>[<\/span>0<\/span>],<\/span> $size<\/span>[<\/span>1<\/span>]);<\/span>\r\n\r\n        \/\/\u4fdd\u5b58<\/span>\r\n        if<\/span> (<\/span>mime_content_type<\/span>(<\/span>$filename<\/span>)<\/span> ==<\/span> 'image\/jpeg'<\/span>)<\/span> {<\/span>\r\n          imagejpeg<\/span>(<\/span>$image2<\/span>,<\/span> $filename<\/span>);<\/span>\r\n        }<\/span>else<\/span> {<\/span>\r\n          imagepng<\/span>(<\/span>$image2<\/span>,<\/span> $filename<\/span>);<\/span>\r\n        }<\/span>\r\n\r\n        \/\/\u30e1\u30e2\u30ea\u89e3\u653e<\/span>\r\n        imagedestroy<\/span>(<\/span>$image<\/span>);<\/span>\r\n<\/code><\/pre>\n
\u4ee5\u4e0b\u662f\u76f8\u95dc\u8cc7\u6e90\u7684\u53c3\u8003\uff1ahttps:\/\/blog.ver001.com\/php_image_resize_object-fit\/
\nhttps:\/\/detail.chiebukuro.yahoo.co.jp\/qa\/question_detail\/q11117777576
\nhttps:\/\/qiita.com\/mikakane\/items\/290301a308277a384c2d
\nhttp:\/\/iekasegu.work\/column.php?no=144<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5bf9\u56fe\u50cf\u8fdb\u884c\u9884\u5904\u7406 ImageCreateFromJPEG($filename) \u8fd9\u6837\u53ef\u4ee5\u5728\u5185\u5b58\uff08\u5728\u8fd9\u4e2a\u7a0b\u5e8f\u4e2d\uff09 […]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-30304","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"\n\u4f7f\u7528 PHP \u8fdb\u884c\u8c03\u6574\u5927\u5c0f - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u4f7f\u7528 PHP \u8fdb\u884c\u8c03\u6574\u5927\u5c0f\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\/\u4f7f\u7528-php-\u8fdb\u884c\u8c03\u6574\u5927\u5c0f\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u4f7f\u7528 PHP \u8fdb\u884c\u8c03\u6574\u5927\u5c0f\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8e\u4f7f\u7528 PHP \u8fdb\u884c\u8c03\u6574\u5927\u5c0f\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u4f7f\u7528-php-\u8fdb\u884c\u8c03\u6574\u5927\u5c0f\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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