{"id":1543,"date":"2021-05-08T05:26:10","date_gmt":"2021-05-08T05:26:10","guid":{"rendered":"https:\/\/phptutorial.net\/?page_id=1543"},"modified":"2025-04-07T12:47:41","modified_gmt":"2025-04-07T12:47:41","slug":"php-rtrim","status":"publish","type":"page","link":"https:\/\/www.phptutorial.net\/php-tutorial\/php-rtrim\/","title":{"rendered":"PHP rtrim"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you&#8217;ll learn how to use the PHP <code>rtrim()<\/code> function to remove whitespace or other characters from the end of a string.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='introduction-to-the-php-rtrim-function'>Introduction to the PHP rtrim() function <a href=\"#introduction-to-the-php-rtrim-function\" class=\"anchor\" id=\"introduction-to-the-php-rtrim-function\" title=\"Anchor for Introduction to the PHP rtrim() function\">#<\/a><\/h2>\n\n\n\n<p>To remove the whitespace characters or other characters from the end of a <a href=\"https:\/\/phptutorial.net\/php-tutorial\/php-string\/\">string<\/a>, you use the PHP <code>rtrim()<\/code> function.<\/p>\n\n\n\n<p>The following shows the syntax of the <code>rtrim()<\/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\">rtrim ( string $string , string $characters = <span class=\"hljs-string\">\" \\n\\r\\t\\v\\0\"<\/span> ) : string<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The <code>rtrim()<\/code> has two parameters:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>$string<\/code> is the input string.<\/li>\n\n\n\n<li><code>$characters<\/code> is one or more characters that you want to strip from the end of the string.<\/li>\n<\/ul>\n\n\n\n<p>By default, the <code>rtrim()<\/code> function removes the characters from the list &#8221; \\n\\r\\t\\v\\0&#8243; from the end of the string:<\/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>\u201d \u201c<\/td><td>32<\/td><td>0x20<\/td><td>a space<\/td><\/tr><tr><td>\u201c\\t\u201d<\/td><td>9<\/td><td>0x09<\/td><td>a tab<\/td><\/tr><tr><td>\u201c\\n\u201d<\/td><td>10<\/td><td>0x0A<\/td><td>a new line<\/td><\/tr><tr><td>\u201c\\r\u201d<\/td><td>13<\/td><td>0x0D<\/td><td>a return<\/td><\/tr><tr><td>\u201c\\0\u201d<\/td><td>0<\/td><td>0x00<\/td><td>a NUL-byte<\/td><\/tr><tr><td>\u201c\\v\u201d<\/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 strip other characters, you can specify them in the $characters argument.<\/p>\n\n\n\n<p>The <code>rtrim()<\/code> function doesn&#8217;t change the input string ($string). Instead, it returns a new string with the $characters stripped off.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='php-rtrim-function-examples'>PHP rtrim() function examples <a href=\"#php-rtrim-function-examples\" class=\"anchor\" id=\"php-rtrim-function-examples\" title=\"Anchor for PHP rtrim() function examples\">#<\/a><\/h2>\n\n\n\n<p>Let&#8217;s take some examples of using the <code>rtrim()<\/code> function.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id='1-using-the-php-rtrim-function-to-remove-whitespace-characters'>1) Using the PHP rtrim() function to remove whitespace characters <a href=\"#1-using-the-php-rtrim-function-to-remove-whitespace-characters\" class=\"anchor\" id=\"1-using-the-php-rtrim-function-to-remove-whitespace-characters\" title=\"Anchor for 1) Using the PHP rtrim() function to remove whitespace characters\">#<\/a><\/h3>\n\n\n\n<p>The following example uses the <code>rtrim()<\/code> function to strip all the space characters from the end of a string:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"><span class=\"hljs-meta\">&lt;?php<\/span>\n\n$name = <span class=\"hljs-string\">'John Doe   '<\/span>;\n$clean_name = rtrim($name);\n\nvar_dump($clean_name);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/phptutorial.net\/playground\/?q=PD9waHAKCiRuYW1lID0gJ0pvaG4gRG9lICAgJzsKJGNsZWFuX25hbWUgPSBydHJpbSgkbmFtZSk7Cgp2YXJfZHVtcCgkY2xlYW5fbmFtZSk7\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-3\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">string(<span class=\"hljs-number\">8<\/span>) <span class=\"hljs-string\">\"John Doe\"<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h3 class=\"wp-block-heading\" id='2-using-the-php-rtrim-function-to-remove-other-characters'>2) Using the PHP rtrim() function to remove other characters <a href=\"#2-using-the-php-rtrim-function-to-remove-other-characters\" class=\"anchor\" id=\"2-using-the-php-rtrim-function-to-remove-other-characters\" title=\"Anchor for 2) Using the PHP rtrim() function to remove other characters\">#<\/a><\/h3>\n\n\n\n<p>Suppose that you have the following string:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-4\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"><span class=\"hljs-meta\">&lt;?php<\/span>\n\n$paragraph = <span class=\"hljs-string\">\"Hello! How are you? I'm here.\"<\/span>;<\/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>And you want to turn it into an array of strings that don&#8217;t have the period (.), question mark(?), and exclamation mark (!).<\/p>\n\n\n\n<p>To do that, you can use the preg_split() funtion to split the string into sentences:<\/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$paragraph = <span class=\"hljs-string\">\"Hello! How are you? I'm here.\"<\/span>;\n$sentences = preg_split(<span class=\"hljs-string\">'\/(?&lt;=&#91;.?!])\\s+(?=&#91;a-z])\/i'<\/span>, $paragraph);\n\nprint_r($sentences);<\/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=PD9waHAKCiRwYXJhZ3JhcGggPSAiSGVsbG8hIEhvdyBhcmUgeW91PyBJJ20gaGVyZS4iOwokc2VudGVuY2VzID0gcHJlZ19zcGxpdCgnLyg_PD1bLj8hXSlccysoPz1bYS16XSkvaScsICRwYXJhZ3JhcGgpOwoKcHJpbnRfcigkc2VudGVuY2VzKTs\" 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=\"plaintext\" data-shcb-language-slug=\"plaintext\"><span><code class=\"hljs language-plaintext\">Array\n(\n    &#91;0] =&gt; Hello!\n    &#91;1] =&gt; How are you?\n    &#91;2] =&gt; I'm here.\n)    <\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-6\"><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>And then you use the <code>rtrim()<\/code> function to remove the period (.), question mark(?), and exclamation mark (!):<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-7\" 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$paragraph = <span class=\"hljs-string\">\"Hello! How are you? I'm here.\"<\/span>;\n\n<span class=\"hljs-comment\">\/\/ split into sentences<\/span>\n$sentences = preg_split(<span class=\"hljs-string\">'\/(?&lt;=&#91;.?!])\\s+(?=&#91;a-z])\/i'<\/span>, $paragraph);\n\n\n<span class=\"hljs-comment\">\/\/ remove endings<\/span>\n$endings = <span class=\"hljs-string\">'.?!'<\/span>;\n$results = array_map(fn ($s) =&gt; rtrim($s, $endings), $sentences);\n\nprint_r($results);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-7\"><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=PD9waHAKCiRwYXJhZ3JhcGggPSAiSGVsbG8hIEhvdyBhcmUgeW91PyBJJ20gaGVyZS4iOwoKLy8gc3BsaXQgaW50byBzZW50ZW5jZXMKJHNlbnRlbmNlcyA9IHByZWdfc3BsaXQoJy8oPzw9Wy4_IV0pXHMrKD89W2Etel0pL2knLCAkcGFyYWdyYXBoKTsKCgovLyByZW1vdmUgZW5kaW5ncwokZW5kaW5ncyA9ICcuPyEnOwokcmVzdWx0cyA9IGFycmF5X21hcChmbiAoJHMpID0-IHJ0cmltKCRzLCAkZW5kaW5ncyksICRzZW50ZW5jZXMpOwoKcHJpbnRfcigkcmVzdWx0cyk7\" 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-8\" data-shcb-language-name=\"plaintext\" data-shcb-language-slug=\"plaintext\"><span><code class=\"hljs language-plaintext\">Array\n(\n    &#91;0] =&gt; Hello\n    &#91;1] =&gt; How are you\n    &#91;2] =&gt; I'm here\n)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-8\"><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>rtrim()<\/code> function to remove the whitespace or other characters from the end of a 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=\"1543\"\n\t\t\t\tdata-post-url=\"https:\/\/www.phptutorial.net\/php-tutorial\/php-rtrim\/\"\n\t\t\t\tdata-post-title=\"PHP rtrim\"\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=\"1543\"\n\t\t\t\tdata-post-url=\"https:\/\/www.phptutorial.net\/php-tutorial\/php-rtrim\/\"\n\t\t\t\tdata-post-title=\"PHP rtrim\"\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>In this tutorial, you&#8217;ll learn how to use the PHP rtrim() function to remove whitespace or other characters from the end of a string.d<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":15,"menu_order":114,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1543","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/pages\/1543","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=1543"}],"version-history":[{"count":5,"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/pages\/1543\/revisions"}],"predecessor-version":[{"id":3254,"href":"https:\/\/www.phptutorial.net\/wp-json\/wp\/v2\/pages\/1543\/revisions\/3254"}],"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=1543"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}