PHP stristr() 函数
实例
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<?php
echo stristr("Hello world!","WORLD");
?>
Definition and Usage
The stristr() function searches for the first occurrence of a string in another string.
Note:This function is binary safe.
Note:This function is case-insensitive. If you need a case-sensitive search, please use strstr() Function.
Syntax
stristr(string,search ,before_search)
| Parameter | Description |
|---|---|
| string | Required. Specifies the string to be searched in. |
| search |
Required. Specifies the string to be searched. If the parameter is a number, it will search for the character corresponding to the ASCII value of the number. |
| before_search |
Optional. The default value is "false" boolean. If set to "true", it will return search The string part before the first occurrence of the parameter. |
Technical Details
| Return Value: | Return the remaining part of the string (from the match point). If the searched string is not found, return FALSE. |
| PHP Version: | 4+ |
| Update Log: |
In PHP 5.3, a new before_search Parameters. In PHP 4.3, this function becomes binary safe. |
More Examples
Example 1
Search the string with the ASCII value of "o" and return the remaining part of the string:
<?php
echo stristr("Hello world!",111);
?>
Example 2
Return the string part before the first occurrence of "world":
<?php
echo stristr("Hello world!","WORLD",true);
?>
