usort

PHP 4, PHP 5, PHP 7, PHP 8

usort - Sort an array by values using a user-defined comparison function

Code Examples

Example #1 usort example

Result: 0: 1 1: 2 2: 3 3: 5 4: 6

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<?php
function cmp($a, $b)
 
 
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Example #2 usort example using multi-dimensional array

Result: $fruits[0]: apples $fruits[1]: grapes $fruits[2]: lemons

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<?php
function cmp($a, $b)
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Example #3 usort example using a closure to sort a multi-dimensional array

Result: y, a x, b z, c

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<?php
$array[0] = array('key_a' => 'z', 'key_b' => 'c');
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Example #4 usort example using the spaceship operator

Result: Baldwin, Adam Baldwin, Alec West, Adam

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<?php
$people[0] = ['first' => 'Adam', 'last' => 'West'];
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Example #5 usort example using a member function of an object

Result: b c d

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<?php
class TestObj {
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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usort

Example #1 usort example

Example #2 usort example using multi-dimensional array

Example #3 usort example using a closure to sort a multi-dimensional array

Example #4 usort example using the spaceship operator

Example #5 usort example using a member function of an object

Function usort:

Arrays Functions

Most used PHP functions