(PHP 4, PHP 5)
strcspn — Find length of initial segment not matching mask
Returns the length of the initial segment of str1 which does not contain any of the characters in str2 .
The first string.
The second string.
The start position of the string to examine.
The length of the string to examine.
Returns the length of the segment as an integer.
| 版本 | 说明 |
|---|---|
| 4.3.0 | The start and length were added |
Note: 本函数可安全用于二进制对象。