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<?php $a= array( 'mela' => 'pera', 'pippo'=> 'pera', 'carlo'=>'banana', 'saverio'=>'pera', 'antonio'=>'banana', ); $b= array_diff_key( $a , array_unique( $a ) ); $i=0; print_r($b); print_r($b[1]);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Array ( [pippo] => pera [saverio] => pera [antonio] => banana ) Warning: Undefined array key 1 in /in/Cf5sL on line 19
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33
Array ( [pippo] => pera [saverio] => pera [antonio] => banana ) Notice: Undefined offset: 1 in /in/Cf5sL on line 19
Output for 7.3.32 - 7.3.33
Array ( [pippo] => pera [saverio] => pera [antonio] => banana )
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Array ( [pippo] => pera [saverio] => pera [antonio] => banana ) Notice: Undefined offset: 1 in /in/Cf5sL on line 19
Output for 5.0.0 - 5.0.5
Fatal error: Call to undefined function array_diff_key() in /in/Cf5sL on line 16
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: array_diff_key() in /in/Cf5sL on line 16
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4
Fatal error: Call to undefined function: array_diff_key() in /in/Cf5sL on line 16
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: array_diff_key() in /in/Cf5sL on line 16

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