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<?php $arr = [ ['a' => 'a', 'int' => 10], ['a' => 'foo', 'int' => 5], ['a' => 'bar', 'int' => 12] ]; usort($arr, function($a, $b) { return $a['int'] <=> $b['int']; }); var_export($arr); echo "\n---\n"; $arr = [ ['a' => 'a', 'int' => 10], ['a' => 'foo', 'int' => 5], ['a' => 'bar', 'int' => 12] ]; usort($arr, fn($a, $b) => $a['int'] <=> $b['int']); var_export($arr); echo "\n---\n"; $arr = [ ['a' => 'a', 'int' => 10], ['a' => 'foo', 'int' => 5], ['a' => 'bar', 'int' => 5] ]; usort($arr, fn($a, $b) => [$a['int'], $a['a']] <=> [$b['int'], $b['a']]); var_export($arr);
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0 - 8.5.1
array ( 0 => array ( 'a' => 'foo', 'int' => 5, ), 1 => array ( 'a' => 'a', 'int' => 10, ), 2 => array ( 'a' => 'bar', 'int' => 12, ), ) --- array ( 0 => array ( 'a' => 'foo', 'int' => 5, ), 1 => array ( 'a' => 'a', 'int' => 10, ), 2 => array ( 'a' => 'bar', 'int' => 12, ), ) --- array ( 0 => array ( 'a' => 'bar', 'int' => 5, ), 1 => array ( 'a' => 'foo', 'int' => 5, ), 2 => array ( 'a' => 'a', 'int' => 10, ), )
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.
Output for 7.3.0 - 7.3.33
Parse error: syntax error, unexpected '=>' (T_DOUBLE_ARROW), expecting ')' in /in/QjNg7 on line 20
Process exited with code 255.
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