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run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array( 'fr_CA' => 'fr' ); $c = 'jp_JP'; $b = $a[$c] ?: $c; echo $b; $d = 'fr_CA'; $b = $a[$c] ?: $c; echo $b;
Output for 5.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Notice: Undefined index: jp_JP in /in/TEZld on line 7 jp_JP Notice: Undefined index: jp_JP in /in/TEZld on line 11 jp_JP
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected ':' in /in/TEZld on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected ':' in /in/TEZld on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/TEZld on line 7
Process exited with code 255.