How to remove content after specified characters in php

Two methods: 1. Use the "substr_replace($str,"",strpos($str,"specified character") 1)" statement to replace the content after the specified character position with a null character; 2 , use the "substr($str,0,strpos($str,"specified character") 1)" statement.

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

php remove specified characters Two methods for the following content

Method 1: Using strpos() and substr_replace() functions

• Use strpos () Find the position of the specified character. For example, the character d

• ## uses substr_replace() to replace the content after the specified character with the empty character

substr_replace(() ) is used to replace characters starting from the specified position, and we need to start replacing from after the specified character, so the position value of starting replacement is "position 1 of the specified character".

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$str = "abcdefg";
echo "原字符串：".$str."<br>";
$index = strpos($str,"d");
$res = substr_replace($str,"",$index+1);
echo "去除字符d后的内容：".$res;
?>

Method 2: Use strpos() and substr() functions

• Use strpos function to find Specify the position of the character, for example the character e

• Use the substr function to intercept from the beginning of the string to the position of the specified character

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$str = "abcdefg";
echo "原字符串：".$str."<br>";
$index = strpos($str,"e");
$res = substr($str,0,$index+1);
echo "去除字符e后的内容：".$res;
?>



Recommended learning: "

PHP Video Tutorial"

The above is the detailed content of How to remove content after specified characters in php. For more information, please follow other related articles on the PHP Chinese website!