Rotate a string N times in PHP (PHP) « The Source CookBook ; )

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Rotate a string N times in PHP

This is a way to rotate a string N times. For example:

Let the string be abcdef

if I rotate it 1 time I want bcdefa
if I rotate it 2 times I want cdefab
if I rotate it 3 times I want defabc
...
If I rotate the string its string length times, I should get back the original string.

The following code achieves this in a single line:

PHP
$rotated = substr($str, $n) . substr($str, 0, $n);
 

Submitted by miguelSantirso 6 months ago — last modified less than a minute ago

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