How to use strstr() function in PHP

                PHP String operations are particularly common, and there are many ways to operate them. This article will take you through how to use PHP The strstr() function in finds the first occurrence of a string.

First, let’s take a look at the syntax of the strstr() function.

strstr ( string $haystack  , mixed $needle   ,bool $before_needle = false )

• $haystack: Input string.

• $needle: If $needle is not a string, it will be converted to an integer and used as the character sequence number.

• $before_needle: If true, strstr() will return the part of $needle before its position in $haystack.

• Return value: Returns part of the string or false (if needle is not found).

Code example:

1. Only two parameters

<?php
$email  = &#39;124455555@gamil.com&#39;;
echo $email."<br>";
$domain = strstr($email, &#39;@&#39;);
echo $domain; 
?>

输出：124455555@gamil.com
       @gamil.com

2. The third parameter is true

<?php
$email  = &#39;124455555@gamil.com&#39;;
echo $email."<br>";
$domain = strstr($email, &#39;@&#39;);
echo $domain; // 打印 @example.com
echo "<br>";
$user = strstr($email, &#39;@&#39;, true); // 从 PHP 5.3.0 起
echo $user; // 打印 name
?>

输出：124455555@gamil.com
       @gamil.com
       124455555

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