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break

(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.

代码语言:javascript
复制
<?php
$arr?=?array('one',?'two',?'three',?'four',?'stop',?'five');
while?(list(,?$val)?=?each($arr))?{
????if?($val?==?'stop')?{
????????break;????/*?You?could?also?write?'break?1;'?here.?*/
????}
????echo?"$val<br?/>\n";
}

/*?Using?the?optional?argument.?*/

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

Version

Description

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break 0; is no longer valid.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.

← foreach

continue →

代码语言:txt
复制
 ? 1997–2017 The PHP Documentation Group

Licensed under the Creative Commons Attribution License v3.0 or later.

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