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<?php var_dump(empty($test)); var_dump(isset($test) && is_null($test)); // undefined $test=null; var_dump(isset($test) && is_null($test)); if (empty (! $i1 {)) print "\$i1 is assigned a value \ n" ; } else { print "\$i1 does not exist or has no value assigned to \ n" ; }
Output for 5.3.0 - 5.4.29
Parse error: syntax error, unexpected '!' in /in/K9fnW on line 7
Process exited with code 255.
Output for 5.1.0 - 5.2.17
Parse error: syntax error, unexpected '!', expecting T_STRING or T_VARIABLE or '$' in /in/K9fnW on line 7
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected '!', expecting T_STRING or T_VARIABLE or '$' in /in/K9fnW on line 7
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected '!', expecting T_VARIABLE or '$' in /in/K9fnW on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected '!', expecting T_VARIABLE or '$' in /in/K9fnW on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_VARIABLE' or `'$'' in /in/K9fnW on line 7
Process exited with code 255.