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<?php $a = array ( 0 => array ( 'name' => 'test', 'address_1' => 'test', 'address_2' => '', 'address_3' => '', 'address_4' => '', 'postcode' => 'test', 'country' => '1', 'tel' => '123566', ), 1 => array ( 'name' => 'test', 'address_1' => 'test', 'address_2' => '', 'address_3' => '', 'address_4' => '', 'postcode' => 'test', 'country' => '1', 'tel' => '123566', ), 2 => array ( 'name' => 'test', 'address_1' => 'test', 'address_2' => '', 'address_3' => '', 'address_4' => '', 'postcode' => 'test', 'country' => '1', 'tel' => '123566', ), 3 => array ( 'name' => 'test', 'address_1' => 'test', 'address_2' => '', 'address_3' => '', 'address_4' => '', 'postcode' => 'test', 'country' => '1', 'tel' => '123566', ), ); // $acount = array_count_values($a); print_r(array_keys($acount)); var_export(array_keys($acount));
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
Warning: Undefined variable $acount in /in/jLpjU on line 52 Fatal error: Uncaught TypeError: array_keys(): Argument #1 ($array) must be of type array, null given in /in/jLpjU:52 Stack trace: #0 /in/jLpjU(52): array_keys(NULL) #1 {main} thrown in /in/jLpjU on line 52
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined variable: acount in /in/jLpjU on line 52 Warning: array_keys() expects parameter 1 to be array, null given in /in/jLpjU on line 52 Notice: Undefined variable: acount in /in/jLpjU on line 54 Warning: array_keys() expects parameter 1 to be array, null given in /in/jLpjU on line 54 NULL
Output for 7.3.32 - 7.3.33
Warning: array_keys() expects parameter 1 to be array, null given in /in/jLpjU on line 52 Warning: array_keys() expects parameter 1 to be array, null given in /in/jLpjU on line 54 NULL
Output for 5.0.4 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Notice: Undefined variable: acount in /in/jLpjU on line 52 Warning: array_keys(): The first argument should be an array in /in/jLpjU on line 52 Notice: Undefined variable: acount in /in/jLpjU on line 54 Warning: array_keys(): The first argument should be an array in /in/jLpjU on line 54 NULL
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.3
Notice: Undefined variable: acount in /in/jLpjU on line 52 Warning: array_keys(): The first argument should be an array in /in/jLpjU on line 52 Notice: Undefined variable: acount in /in/jLpjU on line 54 Warning: array_keys(): The first argument should be an array in /in/jLpjU on line 54 NULL
Output for 4.3.0 - 4.3.1
Notice: Undefined variable: acount in /in/jLpjU on line 52 Warning: array_keys() [http://www.php.net/function.array-keys]: The first argument should be an array in /in/jLpjU on line 52 Notice: Undefined variable: acount in /in/jLpjU on line 54 Warning: array_keys() [http://www.php.net/function.array-keys]: The first argument should be an array in /in/jLpjU on line 54 NULL

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