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<?php $arr1 = array('green', 'blue', 'cyan1'); // blue cyan1 green $arr2 = array('yellow', 'red', 'cyan2'); // cyan2 red yellow $i = 1; function print_elements($e1, $e2) { global $i; $r = substr($e1, 0, 4) <=> substr($e2, 0, 4); echo "$i. $e1 <=> $e2 == $r\n"; $i++; return $r; } print_r(array_uintersect($arr1, $arr2, 'print_elements'));
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 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 - 8.3.27, 8.4.1 - 8.4.14
1. green <=> blue == 1 2. cyan1 <=> blue == 1 3. green <=> cyan1 == 1 4. yellow <=> red == 1 5. cyan2 <=> red == -1 6. blue <=> cyan2 == -1 7. cyan1 <=> cyan2 == 0 8. cyan1 <=> cyan2 == 0 9. cyan1 <=> green == -1 10. green <=> red == -1 Array ( [2] => cyan1 )
preferences:
138.9 ms | 408 KiB | 5 Q