Remove beginning of PHP string until it's 13 characters?

I have a variable that needs it's value's shortened until they are 13 characters. It needs to chop off characters from the beginning of the string. Is thi开发者_运维问答s built into PHP?

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The following should work for you:

$str = substr($str, -13);

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The substr function is what you're looking for,

$text = "abcdefghijklmnopqrstuvwxyz";
$text = substr($text, -13);

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Use substr:

$v = substr($v, -13);