{"id":10021,"date":"2024-03-14T10:27:42","date_gmt":"2024-03-14T10:27:42","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/what-is-the-usage-of-php-hash_hmac\/"},"modified":"2025-08-03T18:13:18","modified_gmt":"2025-08-03T18:13:18","slug":"what-is-the-usage-of-php-hash_hmac","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/what-is-the-usage-of-php-hash_hmac\/","title":{"rendered":"PHP hash_hmac: Usage Guide"},"content":{"rendered":"<p>The hash_hmac function in PHP is used to calculate HMAC (Hash-based Message Authentication Code). HMAC is a method of encrypting data using a key, combining a hash function and a key to generate a message authentication code.<\/p>\n<p>The usage of the hash_hmac function is as follows:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-title function_ invoke__\">hash_hmac<\/span>(<span class=\"hljs-keyword\">string<\/span> <span class=\"hljs-variable\">$algo<\/span>, <span class=\"hljs-keyword\">string<\/span> <span class=\"hljs-variable\">$data<\/span>, <span class=\"hljs-keyword\">string<\/span> <span class=\"hljs-variable\">$key<\/span>, <span class=\"hljs-keyword\">bool<\/span> <span class=\"hljs-variable\">$raw_output<\/span> = <span class=\"hljs-literal\">false<\/span>): <span class=\"hljs-keyword\">string<\/span>|<span class=\"hljs-literal\">false<\/span>\r\n<\/code><\/pre>\n<p>Description of Parameters:<\/p>\n<ol>\n<li>$algorithm: The name of a hashing algorithm, such as &#8220;sha256&#8221;, &#8220;md5&#8221;, etc.<\/li>\n<li>$data: Data to compute HMAC.<\/li>\n<li>$key: Key used to calculate HMAC.<\/li>\n<li>$raw_output (optional): If set to true, output the raw binary data; if set to false, output the hexadecimal string. Default is false.<\/li>\n<\/ol>\n<p>&#8220;\u5979\u52aa\u529b\u5de5\u4f5c\u800c\u4e14\u53d6\u5f97\u4e86\u6210\u529f\u3002&#8221;<\/p>\n<p>Option: She worked hard and achieved success.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-variable\">$data<\/span> = <span class=\"hljs-string\">\"Hello, world!\"<\/span>;\r\n<span class=\"hljs-variable\">$key<\/span> = <span class=\"hljs-string\">\"secret_key\"<\/span>;\r\n<span class=\"hljs-variable\">$hash<\/span> = <span class=\"hljs-title function_ invoke__\">hash_hmac<\/span>(<span class=\"hljs-string\">'sha256'<\/span>, <span class=\"hljs-variable\">$data<\/span>, <span class=\"hljs-variable\">$key<\/span>);\r\n<span class=\"hljs-keyword\">echo<\/span> <span class=\"hljs-variable\">$hash<\/span>;\r\n<\/code><\/pre>\n<p>The example above uses the SHA256 algorithm and a specified key to calculate the HMAC of the given data, and outputs the computed message authentication code.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The hash_hmac function in PHP is used to calculate HMAC (Hash-based Message Authentication Code). HMAC is a method of encrypting data using a key, combining a hash function and a key to generate a message authentication code. The usage of the hash_hmac function is as follows: hash_hmac(string $algo, string $data, string $key, bool $raw_output = [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[1871,12218,12229,12219,12228],"class_list":["post-10021","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-data-encryption","tag-hash_hmac","tag-php-hashing","tag-php-hmac","tag-security-functions"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>PHP hash_hmac: Usage Guide - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Master PHP hash_hmac function for HMAC generation. Learn parameters, algorithms, and security best practices.\" \/>\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\/blog\/what-is-the-usage-of-php-hash_hmac\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PHP hash_hmac: Usage Guide\" \/>\n<meta property=\"og:description\" content=\"Master PHP hash_hmac function for HMAC generation. 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