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<?php $array = [null, '', .0, false, null, 0, '0.0', -.1, "\0", false]; $unique = array(); foreach($array as $v){ isset($k[$v]) || ($k[$v]=1) && $unique[] = $v; } var_dump($unique);
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
Deprecated: Implicit conversion from float -0.1 to int loses precision in /in/ZDcsU on line 8 array(4) { [0]=> NULL [1]=> float(0) [2]=> string(3) "0.0" [3]=> string(1) "" }
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
array(4) { [0]=> NULL [1]=> float(0) [2]=> string(3) "0.0" [3]=> string(1) "" }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/ZDcsU on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/ZDcsU on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/ZDcsU on line 3
Process exited with code 255.

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