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PHP String Tips: If you want to remove first or last n characters from string, you can use substr() function. The substr() function enables you to cut strings into smaller strings.

<?
$string = 'abcdef'; 
echo substr($string, 1); // return bcdef
echo substr($string, 2); // return cdef
?>

Following sample when we use 3 arguments:

<?
$string = 'abcdef'; 
echo substr($string, 0, 4); // return abcd
echo substr($string, 1, 3); // return bcd
?>