How to replace part of a string in php

How to implement partial string replacement in php: First create a PHP sample file; then use the "str_replace("red","black","red green yellow pink purple");" method to replace the string That’s it.

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php now replaces part of the string

mixed str_replace ( mixed $search , mixed $replace , mixed $subject [, int &$count ] )

This function returns a string or array. This string or array is the result of replacing all searches in the subject with replace.

1. $search, the string or array to be replaced

2. $replace, the string or array to be replaced

3. $subject, The string or array being queried

4. $count, optional, if specified, will be set to the number of replacements

5. Return value: This function returns the replaced array Or string (newly generated)

<?php
//实例一：字符串替换字符串
$str1 = str_replace("red","black","red green yellow pink purple");
echo $str1."";//输出结果为black green yellow pink purple
?>

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