How to remove a certain character in php

How to remove a certain character in php: 1. Use the "str_replace("123", "", $str);" method to delete the specified string; 2. Use "preg_replace("#abc#i ", "", $str);" method removes specified characters.

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You can use the str_replace function or preg_replace function to replace the specified string with Empty, that is to say, delete the specified string:

<?php
$str = &#39;a123abc112233aaccdd321123abcd&#39;;
echo str_replace("123", "", $str);
//输出：aabc112233aaccdd321abcd a123112233/aiezu.com/aaccdd321123d
 
$str = &#39;a123abc112233/aiezu.com/aaccdd321123abcd&#39;;
echo preg_replace("#abc#i", "", $str);
//输出：a123112233/aiezu.com/aaccdd321123d

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