PHP Conference China 2020


(PHP 4, PHP 5, PHP 7)

break ends execution of the current for, foreach, while, do-while or switch structure.

break accepts an optional numeric argument which tells it how many nested enclosing structures are to be broken out of. The default value is 1, only the immediate enclosing structure is broken out of.

= array('one''two''three''four''stop''five');
foreach (
$arr as $val) {
    if (
$val == 'stop') {
/* You could also write 'break 1;' here. */
"$val<br />\n";

/* Using the optional argument. */

$i 0;
while (++
$i) {
    switch (
$i) {
"At 5<br />\n";
1;  /* Exit only the switch. */
case 10:
"At 10; quitting<br />\n";
2;  /* Exit the switch and the while. */

Changelog for break
Version Description
7.0.0 break outside of a loop or switch control structure is now detected at compile-time instead of run-time as before, and triggers an E_COMPILE_ERROR.
5.4.0 break 0; is no longer valid. In previous versions it was interpreted the same as break 1;.
5.4.0 Removed the ability to pass in variables (e.g., $num = 2; break $num;) as the numerical argument.

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