<?php
class ZunicoreNull {
public function __toString() {
// return an empty string that in PHP evaluates to false
return FALSE;
}
}
$null = new ZunicoreNull;
if ((string)$null) {
print "is true";
}
else {
print "is false";
}
Fatal error: Uncaught Error: Method ZunicoreNull::__toString() must return a string value in /in/fKMUC:13
Stack trace:
#0 {main}
thrown in /in/fKMUC on line 13
Process exited with code 255.
Catchable fatal error: Method ZunicoreNull::__toString() must return a string value in /in/fKMUC on line 13
Process exited with code 255.
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
is true
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/fKMUC on line 5
Process exited with code 255.
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/fKMUC on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/fKMUC on line 5
Process exited with code 255.