{"id":1518,"date":"2021-05-08T01:20:27","date_gmt":"2021-05-08T01:20:27","guid":{"rendered":"https:\/\/phptutorial.net\/?page_id=1518"},"modified":"2025-04-07T13:10:43","modified_gmt":"2025-04-07T13:10:43","slug":"php-str_contains","status":"publish","type":"page","link":"https:\/\/www.phptutorial.net\/php-tutorial\/php-str_contains\/","title":{"rendered":"PHP str_contains"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you&#8217;ll learn how to use the PHP <code>str_contains()<\/code> function to check if a string contains a substring.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='introduction-to-the-php-str_contains-function'>Introduction to the PHP str_contains() function <a href=\"#introduction-to-the-php-str_contains-function\" class=\"anchor\" id=\"introduction-to-the-php-str_contains-function\" title=\"Anchor for Introduction to the PHP str_contains() function\">#<\/a><\/h2>\n\n\n\n<p>The PHP <code>str_contains()<\/code> function checks if a <a href=\"https:\/\/phptutorial.net\/php-tutorial\/php-string\/\">string<\/a> contains a substring. <\/p>\n\n\n\n<p>Here&#8217;s the syntax of the <code>str_contains()<\/code> function:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">str_contains ( string $haystack , string $needle ) : bool<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The <code>str_contains()<\/code> function has the following parameters:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>$haystack<\/code> is the string to be checked.<\/li>\n\n\n\n<li><code>$needle<\/code> is the substring to search for in the input string <code>$haystack<\/code>.<\/li>\n<\/ul>\n\n\n\n<p>The <code>str_contains()<\/code> function returns <code>true<\/code> if the <code>$needle<\/code> is in the <code>$haystack<\/code>, <code>false<\/code> otherwise.<\/p>\n\n\n\n<p>When searching for the <code>$needle<\/code> in the <code>$haystack<\/code>, the <code>str_contains()<\/code> function uses a <strong>case-sensitive search<\/strong>.<\/p>\n\n\n\n<p>Note that <code>str_contains()<\/code> function has been available since PHP 8.0.0. If you use an earlier version of PHP, you can polyfill the <code>str_contains()<\/code> function like this:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"><span class=\"hljs-meta\">&lt;?php<\/span>\n\n<span class=\"hljs-keyword\">if<\/span> (!function_exists(<span class=\"hljs-string\">'str_contains'<\/span>)) {\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">function<\/span> <span class=\"hljs-title\">str_contains<\/span><span class=\"hljs-params\">( $haystack, $needle)<\/span>\n    <\/span>{\n        <span class=\"hljs-keyword\">return<\/span> $needle !== <span class=\"hljs-string\">''<\/span> &amp;&amp; mb_strpos($haystack, $needle) !== <span class=\"hljs-keyword\">false<\/span>;\n  \n}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h2 class=\"wp-block-heading\" id='php-str_contains-function-examples'>PHP str_contains() function examples <a href=\"#php-str_contains-function-examples\" class=\"anchor\" id=\"php-str_contains-function-examples\" title=\"Anchor for PHP str_contains() function examples\">#<\/a><\/h2>\n\n\n\n<p>The following example uses the <code>str_contains()<\/code> function to check if the string <code>'PHP'<\/code> is in the string <code>'PHP string functions'<\/code>:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-3\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"><span class=\"hljs-meta\">&lt;?php<\/span>\n\n$haystack = <span class=\"hljs-string\">'PHP is cool.'<\/span>;\n$needle = <span class=\"hljs-string\">'PHP'<\/span>;\n\n$result = str_contains($haystack, $needle) ? <span class=\"hljs-string\">'is'<\/span> : <span class=\"hljs-string\">'is not'<\/span>;\n\n<span class=\"hljs-keyword\">echo<\/span> <span class=\"hljs-string\">\"The string {$needle} {$result} in the sentence.\"<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/phptutorial.net\/playground\/?q=PD9waHAKCiRoYXlzdGFjayA9ICdQSFAgaXMgY29vbC4nOwokbmVlZGxlID0gJ1BIUCc7CgokcmVzdWx0ID0gc3RyX2NvbnRhaW5zKCRoYXlzdGFjaywgJG5lZWRsZSkgPyAnaXMnIDogJ2lzIG5vdCc7CgplY2hvICJUaGUgc3RyaW5nIHskbmVlZGxlfSB7JHJlc3VsdH0gaW4gdGhlIHNlbnRlbmNlLiI7\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-4\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">The string PHP is in the sentence<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-4\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>As mentioned earlier, the <code>str_contains()<\/code> function uses the case-sensitive search for checking if a substring is in a string. For example:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-5\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"><span class=\"hljs-meta\">&lt;?php<\/span>\n\n$haystack = <span class=\"hljs-string\">'PHP is cool.'<\/span>;\n$needle = <span class=\"hljs-string\">'Cool'<\/span>;\n\n$result = str_contains($haystack, $needle) ? <span class=\"hljs-string\">'is'<\/span> : <span class=\"hljs-string\">'is not'<\/span>;\n\n<span class=\"hljs-keyword\">echo<\/span> <span class=\"hljs-string\">\"The string {$needle} {$result} in the sentence.\"<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-5\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/phptutorial.net\/playground\/?q=PD9waHAKCiRoYXlzdGFjayA9ICdQSFAgaXMgY29vbC4nOwokbmVlZGxlID0gJ0Nvb2wnOwoKJHJlc3VsdCA9IHN0cl9jb250YWlucygkaGF5c3RhY2ssICRuZWVkbGUpID8gJ2lzJyA6ICdpcyBub3QnOwoKZWNobyAiVGhlIHN0cmluZyB7JG5lZWRsZX0geyRyZXN1bHR9IGluIHRoZSBzZW50ZW5jZS4iOw\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-6\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">The string Cool is not in the sentence.<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-6\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h2 class=\"wp-block-heading\" id='summary'>Summary <a href=\"#summary\" class=\"anchor\" id=\"summary\" title=\"Anchor for Summary\">#<\/a><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use the PHP <code>str_contains()<\/code> function to carry a case-sensitive search to check if a string is in another string.<\/li>\n<\/ul>\n<div class=\"helpful-block-content\" data-title=\"\">\n\t<header>\n\t\t<div class=\"wth-question\">Did you find this tutorial useful?<\/div>\n\t\t<div class=\"wth-thumbs\">\n\t\t\t<button\n\t\t\t\tdata-post=\"1518\"\n\t\t\t\tdata-post-url=\"https:\/\/www.phptutorial.net\/php-tutorial\/php-str_contains\/\"\n\t\t\t\tdata-post-title=\"PHP str_contains\"\n\t\t\t\tdata-response=\"1\"\n\t\t\t\tclass=\"wth-btn-rounded wth-yes-btn\"\n\t\t\t>\n\t\t\t\t<svg\n\t\t\t\t\txmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n\t\t\t\t\tviewBox=\"0 0 24 24\"\n\t\t\t\t\tfill=\"none\"\n\t\t\t\t\tstroke=\"currentColor\"\n\t\t\t\t\tstroke-width=\"2\"\n\t\t\t\t\tstroke-linecap=\"round\"\n\t\t\t\t\tstroke-linejoin=\"round\"\n\t\t\t\t\tclass=\"feather feather-thumbs-up block w-full h-full\"\n\t\t\t\t>\n\t\t\t\t\t<path\n\t\t\t\t\t\td=\"M14 9V5a3 3 0 0 0-3-3l-4 9v11h11.28a2 2 0 0 0 2-1.7l1.38-9a2 2 0 0 0-2-2.3zM7 22H4a2 2 0 0 1-2-2v-7a2 2 0 0 1 2-2h3\"\n\t\t\t\t\t><\/path>\n\t\t\t\t<\/svg>\n\t\t\t\t<span class=\"sr-only\"> Yes <\/span>\n\t\t\t<\/button>\n\n\t\t\t<button\n\t\t\t\tdata-response=\"0\"\n\t\t\t\tdata-post=\"1518\"\n\t\t\t\tdata-post-url=\"https:\/\/www.phptutorial.net\/php-tutorial\/php-str_contains\/\"\n\t\t\t\tdata-post-title=\"PHP str_contains\"\n\t\t\t\tclass=\"wth-btn-rounded wth-no-btn\"\n\t\t\t>\n\t\t\t\t<svg\n\t\t\t\t\txmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n\t\t\t\t\tviewBox=\"0 0 24 24\"\n\t\t\t\t\tfill=\"none\"\n\t\t\t\t\tstroke=\"currentColor\"\n\t\t\t\t\tstroke-width=\"2\"\n\t\t\t\t\tstroke-linecap=\"round\"\n\t\t\t\t\tstroke-linejoin=\"round\"\n\t\t\t\t>\n\t\t\t\t\t<path\n\t\t\t\t\t\td=\"M10 15v4a3 3 0 0 0 3 3l4-9V2H5.72a2 2 0 0 0-2 1.7l-1.38 9a2 2 0 0 0 2 2.3zm7-13h2.67A2.31 2.31 0 0 1 22 4v7a2.31 2.31 0 0 1-2.33 2H17\"\n\t\t\t\t\t><\/path>\n\t\t\t\t<\/svg>\n\t\t\t\t<span class=\"sr-only\"> No <\/span>\n\t\t\t<\/button>\n\t\t<\/div>\n\t<\/header>\n\n\t<div class=\"wth-form hidden\">\n\t\t<div class=\"wth-form-wrapper\">\n\t\t\t<div class=\"wth-title\"><\/div>\n\t\t\t\n\t\t\t<textarea class=\"wth-message\"><\/textarea>\n\n\t\t\t<button class=\"btn btn-primary wth-btn-submit\">Send<\/button>\n\t\t\t<button class=\"btn wth-btn-cancel\">Cancel<\/button>\n\t\t\n\t\t<\/div>\n\t<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Summary: in this tutorial, you&#8217;ll learn how to use the PHP str_contains() function to check if a string contains a substring. Introduction to the PHP str_contains() function # The PHP str_contains() function checks if a string contains a substring. Here&#8217;s the syntax of the str_contains() function: The str_contains() function has the following parameters: The str_contains() [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":15,"menu_order":117,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1518","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/pages\/1518","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/comments?post=1518"}],"version-history":[{"count":4,"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/pages\/1518\/revisions"}],"predecessor-version":[{"id":3258,"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/pages\/1518\/revisions\/3258"}],"up":[{"embeddable":true,"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/pages\/15"}],"wp:attachment":[{"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/media?parent=1518"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}