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In PHP, you can directly use the substr() function to remove the last few characters in reverse order. The syntax format is "substr(string object, 0,-x)". The parameter x is the number of characters that need to be removed; if If successful, the string with the characters removed will be returned. If failed, FALSE will be returned, or an empty string will be returned.
The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer
php remove the last few characters
<?php header('content-type:text/html;charset=utf-8'); $str = '123,234,345,'; echo "原字符串:",$str,'<br/>'; echo "去掉最后1个字符的字符串:",substr($str,0,-1),'<br/>'; echo "去掉最后2个字符的字符串:",substr($str,0,-2),'<br/>'; echo "去掉最后3个字符的字符串:",substr($str,0,-3),'<br/>'; echo "去掉最后4个字符的字符串:",substr($str,0,-4),'<br/>'; echo "去掉最后5个字符的字符串:",substr($str,0,-5); ?>
Output:
原字符串:123,234,345, 去掉最后1个字符的字符串:123,234,345 去掉最后2个字符的字符串:123,234,34 去掉最后3个字符的字符串:123,234,3 去掉最后4个字符的字符串:123,234, 去掉最后5个字符的字符串:123,234
Description:
substr() function returns a part of a string. Syntax:
substr(string,start,length)
Parameter | Description |
---|---|
string | Required. Specifies a part of the string to be returned. |
start | Required. Specifies where in the string to begin.
|
length | Optional. Specifies the length of the string to be returned. The default is until the end of the string.
|
Return value: Returns the extracted part of the string, FALSE if failed, or an empty string.
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