PHP strcspn () function
Examples
"! Hello world" to find the output character "w" characters in the string before looking for:
<?php
echo strcspn("Hello world!","w");
?>
echo strcspn("Hello world!","w");
?>
Running instance »
Definition and Usage
strcspn () function returns before finding any given character in the number of characters to find (including spaces).
Tip: the Use at The strspn () function to at The Number of characters found in at The String that the contains only characters from A specified Character List.
Note: This function is binary-safe.
grammar
strcspn( string,char,start,length )
参数 | 描述 |
---|---|
string | 必需。规定要搜索的字符串。 |
char | 必需。规定要查找的字符。 |
start | 可选。规定开始查找的位置。 |
length | 可选。规定字符串的长度(搜索多少字符)。 |
technical details
return value: | Back before finding any given character, the number of characters in the string to find. |
---|---|
PHP version: | 4+ |
Update log: | In PHP 4.3, add the start and length parameters. |
More examples
Example 1
"! Hello world" to use all the parameters to find the character in the string output "w" characters before looking for:
<?php
echo strcspn("Hello world!","w",0,6); // The start position is 0 and the length of the search string is 6.
?>
echo strcspn("Hello world!","w",0,6); // The start position is 0 and the length of the search string is 6.
?>
Running instance »
PHP String Reference