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run code in 150+ php & hhvm versions
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<?php $pf = array( 'a' => 1, 'b' => 2 ); print_r( $pf); class tst { public $aa = 1; public $bb = 2; } $cvar = new tst; print_r($cvar); print_r($cvar->'aa'); ?>
Output for 5.4.0 - 5.4.28
Parse error: syntax error, unexpected ''aa'' (T_CONSTANT_ENCAPSED_STRING), expecting identifier (T_STRING) or variable (T_VARIABLE) or '{' or '$' in /in/1X5uW on line 19
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected T_CONSTANT_ENCAPSED_STRING, expecting T_STRING or T_VARIABLE or '{' or '$' in /in/1X5uW on line 19
Process exited with code 255.