PHP strchr() 函数
实例
查找 "world" 在 "Hello world!" 中的第一次出现，并返回此字符串的其余部分：
<?php
echo strchr("Hello world!","world");
?>
Definition and Usage
The strchr() function searches for the first occurrence of a string within another string.
This function is an alias of the strstr() function.
Note:This function is binary safe.
Note:This function is case-sensitive. To perform a case-insensitive search, please use stristr() Function.
Syntax
strchr(string,search,before_search);
| Parameters | 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" for the boolean value. If set to "true", it will return search The string part before the first occurrence of the parameter. |
Technical Details
| Return Value: | Returns the rest of the string (from the match point). If the searched string is not found, it returns FALSE. |
| PHP Version: | 4+ |
| Update Log: | In PHP 5.3, a new feature was added: before_search Parameters. |
More Examples
Example 1
Search the string by the ASCII value of "o" and return the rest of the string:
<?php
echo strchr("Hello world!",111);
?>
Example 2
Return the string part before the first occurrence of the searched string:
<?php
echo strchr("Hello world!","world",true);
?>
