How to remove the last three characters in php

In PHP, you can use the substr() function to remove the last three characters of a string. This function can return a part of the string; the specific syntax format is "substr(specified string, 0,-3) ".

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

php removes the last three characters of the string Characters

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;); 
$str = &#39;programming&#39;;
echo "原字符串：{$str}<br /><br />";
//定义一个字符串
$res = substr($str, -3);
//处理字符串

echo "返回要去除的最后3个字符：{$res}<br />";
$res = substr($str, 0, -3);
//处理字符串
echo "<br />返回除去最后3个字符后的字符串：{$res}";
?>

Output:

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Related function description:

substr() function returns a part of the string.

Syntax

substr(string,start,length)

Note: If the start parameter is negative and length is less than or equal to start, length is 0.

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