Detailed explanation of str_replace() in php (with code examples)

Strings are a commonly used type in php. Replacement of strings is not as convenient as arrays. So how to replace characters in a string? This article will explain Let’s take a look at how to use the str_repalce() function. First, let’s take a look at the syntax of the function:

str_replace    ( mixed $search   , mixed $replace   , mixed $subject   , int $count = ?   )

• $search: search Target value, multiple targets can be specified.

• #$replace: the replacement value of search.

• $subject: Array or string to perform replacement

• $count: Optional, if specified, its value will be set is the number of times replacement occurs.

• Return value: This function returns the replaced array or string.

Code example:

1. There are three required parameters

<?php
$str="ok is great,that is php.cn";
$str1=str_replace("is","hehe",$str);
print_r($str1);
?>

输出：ok hehe great,that hehe php.cn

2. There are four parameters

<?php

$str="ok is great,that is php.cn";
$str1=str_replace("is","hehe",$str,$count);
print_r($str1);
echo "<br>"."总共替换了：".$count;
?>

输出：ok hehe great,that hehe php.cn
总共替换了：2

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