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<?php function modify(&$x) { $x = 50; } function &get_reference() { global $x; return $x; } $x = 42; var_dump($x); modify(get_reference()); var_dump($x); print "======" . PHP_EOL; $x = 42; var_dump($x); modify((get_reference())); // brackets var_dump($x); ?>
Output for 4.3.10 - 4.4.9, 5.0.2 - 5.1.1, 5.6.8 - 7.2.0
int(42) int(50) ====== int(42) int(50)
Output for 5.2.1 - 5.5.35
int(42) int(50) ====== int(42) Strict Standards: Only variables should be passed by reference in /in/RTJsk on line 18 int(42)
Output for 5.1.2 - 5.2.0
int(42) Strict Standards: Only variables should be passed by reference in /in/RTJsk on line 13 int(42) ====== int(42) Strict Standards: Only variables should be passed by reference in /in/RTJsk on line 18 int(42)
Output for 4.3.0 - 4.3.9, 5.0.0 - 5.0.1
int(42) int(50) Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/RTJsk on line 15 ======PHP_EOLint(42) int(50)