{"id":1498,"date":"2021-05-07T09:07:11","date_gmt":"2021-05-07T09:07:11","guid":{"rendered":"https:\/\/phptutorial.net\/?page_id=1498"},"modified":"2025-04-07T12:47:17","modified_gmt":"2025-04-07T12:47:17","slug":"php-trim","status":"publish","type":"page","link":"https:\/\/www.phptutorial.net\/php-tutorial\/php-trim\/","title":{"rendered":"PHP trim"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you&#8217;ll learn how to use the PHP <code>trim()<\/code> function to remove whitespace or other characters from both ends of a string.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='introduction-to-the-php-trim-function'>Introduction to the PHP trim() function <a href=\"#introduction-to-the-php-trim-function\" class=\"anchor\" id=\"introduction-to-the-php-trim-function\" title=\"Anchor for Introduction to the PHP trim() function\">#<\/a><\/h2>\n\n\n\n<p>The <code>trim()<\/code> function removes the whitespaces or other characters from the beginning and end of a <a href=\"https:\/\/phptutorial.net\/php-tutorial\/php-string\/\">string<\/a>.<\/p>\n\n\n\n<p>Here&#8217;s the syntax of the <code>trim()<\/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\">trim ( string $string , string $characters = <span class=\"hljs-string\">\" \\n\\r\\t\\v\\0\"<\/span> ) : string<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The <code>trim()<\/code> function has two parameters:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>$string<\/code> is the input string that will be trimmed.<\/li>\n\n\n\n<li><code>$characters<\/code> argument is optional. It specifies which character to remove from both ends of the <code>$string<\/code>.<\/li>\n<\/ul>\n\n\n\n<p>By default, the <code>trim()<\/code> function removes the following characters:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Character<\/th><th>ASCII<\/th><th>Hex<\/th><th>Description<\/th><\/tr><\/thead><tbody><tr><td>&#8221; &#8220;<\/td><td>32<\/td><td>0x20<\/td><td>a space<\/td><\/tr><tr><td>&#8220;\\t&#8221;<\/td><td>9<\/td><td>0x09<\/td><td>a tab<\/td><\/tr><tr><td>&#8220;\\n&#8221;<\/td><td>10<\/td><td>0x0A<\/td><td>a new line<\/td><\/tr><tr><td>&#8220;\\r&#8221;<\/td><td>13<\/td><td>0x0D<\/td><td>a return<\/td><\/tr><tr><td>&#8220;\\0&#8221;<\/td><td>0<\/td><td>0x00<\/td><td>a NUL-byte<\/td><\/tr><tr><td>&#8220;\\v&#8221;<\/td><td>11<\/td><td>0x0B<\/td><td>a vertical tab<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>If you want to remove other characters, you can specify them in the <code>$characters<\/code> argument.<\/p>\n\n\n\n<p>To specify a range of characters to remove, you can use the &#8216;..&#8217;. For example, to remove all ASCII control characters from both ends of a string, you use the following value for the $characters argument:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"><span class=\"hljs-string\">'\\x00..\\x1F'<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>It&#8217;s important to note that the <code>trim()<\/code> function doesn&#8217;t change the input string. It returns a new string with all the <code>$characters<\/code> removed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='php-trim-function-examples'>PHP trim() function examples <a href=\"#php-trim-function-examples\" class=\"anchor\" id=\"php-trim-function-examples\" title=\"Anchor for PHP trim() function examples\">#<\/a><\/h2>\n\n\n\n<p>Let&#8217;s take some examples of using the PHP <code>trim()<\/code> function.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id='1-using-the-php-trim-function-to-remove-whitespace-from-both-ends-of-a-string'>1) Using the PHP trim() function to remove whitespace from both ends of a string <a href=\"#1-using-the-php-trim-function-to-remove-whitespace-from-both-ends-of-a-string\" class=\"anchor\" id=\"1-using-the-php-trim-function-to-remove-whitespace-from-both-ends-of-a-string\" title=\"Anchor for 1) Using the PHP trim() function to remove whitespace from both ends of a string\">#<\/a><\/h3>\n\n\n\n<p>The following example uses the <code>trim()<\/code> function to remove spaces from the beginning and the end of a string:<\/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$str = <span class=\"hljs-string\">' PHP  '<\/span>;\n$new_str = trim($str);\n\nvar_dump($new_str);<\/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=PD9waHAKCiRzdHIgPSAnIFBIUCAgJzsKJG5ld19zdHIgPSB0cmltKCRzdHIpOwoKdmFyX2R1bXAoJG5ld19zdHIpOw\" 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=\"plaintext\" data-shcb-language-slug=\"plaintext\"><span><code class=\"hljs language-plaintext\">string(3) \"PHP\"<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-4\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">plaintext<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">plaintext<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h3 class=\"wp-block-heading\" id='2-using-the-php-trim-function-to-remove-other-characters'>2) Using the PHP trim() function to remove other characters <a href=\"#2-using-the-php-trim-function-to-remove-other-characters\" class=\"anchor\" id=\"2-using-the-php-trim-function-to-remove-other-characters\" title=\"Anchor for 2) Using the PHP trim() function to remove other characters\">#<\/a><\/h3>\n\n\n\n<p>Suppose you have the following URL:<\/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\">https:<span class=\"hljs-comment\">\/\/www.phptutorial.net\/api\/v1\/posts\/<\/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>To get the request URI, you access the <code>$_SERVER<\/code> array with the key <code>'REQUEST_URI'<\/code>:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-6\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"><span class=\"hljs-meta\">&lt;?php<\/span>\n\n$uri = $_SERVER&#91;<span class=\"hljs-string\">'REQUEST_URI'<\/span>];\n\n<span class=\"hljs-keyword\">echo<\/span> $uri;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-6\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-7\" data-shcb-language-name=\"plaintext\" data-shcb-language-slug=\"plaintext\"><span><code class=\"hljs language-plaintext\">\/api\/v1\/posts\/<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-7\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">plaintext<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">plaintext<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The URI contains both leading and trailing slashes.<\/p>\n\n\n\n<p>To remove the slashes (<code>\/<\/code>) from both ends of the URI, you can use the <code>trim()<\/code> function:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-8\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"><span class=\"hljs-meta\">&lt;?php<\/span>\n\n$uri = $_SERVER&#91;<span class=\"hljs-string\">'REQUEST_URI'<\/span>];\n\n<span class=\"hljs-keyword\">echo<\/span> trim($uri,<span class=\"hljs-string\">'\/'<\/span>);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-8\"><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>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-9\" data-shcb-language-name=\"plaintext\" data-shcb-language-slug=\"plaintext\"><span><code class=\"hljs language-plaintext\">api\/v1\/posts<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-9\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">plaintext<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">plaintext<\/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>trim()<\/code> function to remove whitespaces or other characters from both ends of a string.<\/li>\n<\/ul>\n<div class=\"helpful-block-content\" 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