How to sort versioning info

问题

What's the right way, to handle versioning indicators like 2.4 or 2.4.0.9 etc. to get the ability of sorting versions.

PHP says, that 1.3.4 is not a valid integer, but also a non-valid number.

array('2.4','2.3.4','2.4.0.9')

回答1:

PHP has a version_compare function. Use usort to sort it. Like following. :)

$a = array('2.4','2.3.4','2.4.0.9');
usort($a, 'version_compare');

回答2:

Or, just use natsort:

$array = array('2.4','2.16.6','2.3.4','2.4.0.9');
natsort($array);
print_r($array);

#Array ( [2] => 2.3.4 [0] => 2.4 [3] => 2.4.0.9 [1] => 2.16.6 )

回答3:

Storing it as a string allows you to make use of the version_compare() function:

$versions = array('2.4','2.3.4','2.4.0.9');
usort($versions, 'version_compare');

来源：https://stackoverflow.com/questions/8690823/how-to-sort-versioning-info