UK ['sʌbstər] US ['sʌbstər]
abbr.substructure substructure, underground building
php substr() function syntax
Function: Intercept string
Syntax: substr(string,start,length)
Parameters:
| Parameter | Description |
| string | Required. Specifies a part of the string to be returned. |
| start | Required. Specifies where in the string to begin. Positive number - starts at the specified position in the string, negative number - starts at the specified position from the end of the string, 0 - starts at the first character in the string. |
| length | Optional. Specifies the length of the returned string. The default is until the end of the string. Positive number - the length returned from the position of the start parameter, negative number - the length returned from the end of the string. |
Description: Returns part of the string. If the start parameter is negative and length is less than or equal to start, length is 0.
php substr() function example
<?php
echo substr("Hello world",6);
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Output:
world
<?php $i = "i'm study in php.cn"; echo substr($i,8); ?>
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Output:
y in php.cn