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How to use php usort() function
php usort() function definition and usage
usort() usage User-defined comparison function sorts arrays.
Syntax
usort(array,myfunction);
Parameters
array required. Specifies the array to be sorted.
myfunction Optional. A string that defines a callable comparison function. If the first argument is f2c570bc5a616fb55b90df8c3566974f and the second argument is, the corresponding comparison function must return an integer of f2c570bc5a616fb55b90df8c3566974f 0.
Example
Sort the elements of the $a array using a user-defined comparison function:
<?php function my_sort($a,$b) { if ($a==$b) return 0; return ($a<$b)?-1:1; } $a=array(4,2,8,6); usort($a,"my_sort"); ?>
Output:
2 4 6 8
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