foreach
Just to note: break doesn't work within included file, results in fatal error.
main.php:
<?php
switch ( $i )
{
case '1': // Works
echo "$i";
break;
case '2': // Works
require( 'include1.inc' );
break;
case '3': // Doesn't work
require( 'include2.inc' );
break;
case '4': // Doesn't work, same reason
require( 'include2.inc' );
default: // Works
echo "$i";
}
?>
include1.inc:
<?php
echo "$i";
?>
include2.inc:
<?php
echo "$i";
break;
?>
I didn't find this documented anywhere.
break
break는 현재 for, foreach, while, do-while 또는 switch절의 수행을 멈춘다.
break는 숫자 인자 옵션을 허용함으로써 내포된 구문구조의 깊이를 표시하고 거기서 빠져나올수 있게 해준다.
<?php
$arr = array('one', 'two', 'three', 'four', 'stop', 'five');
while (list (, $val) = each ($arr)) {
if ($val == 'stop') {
break; /* 여기서는 'break 1;'으로 슬 수 있습니다. */
}
echo "$val<br />\n";
}
/* 옵션 인자 사용하기. */
$i = 0;
while (++$i) {
switch ($i) {
case 5:
echo "At 5<br />\n";
break 1; /* switch만 빠져나갑니다. */
case 10:
echo "At 10; quitting<br />\n";
break 2; /* switch와 while을 빠져나갑니다. */
default:
break;
}
}
?>
add a note
User Contributed Notesbreak
cb
08-Jul-2008 03:01
08-Jul-2008 03:01
alan at synergymx dot com
15-Apr-2008 12:06
15-Apr-2008 12:06
Here is a function that returns specific files in an array, with all of the details. Includes some basic garbage checking.
Variables
$source_folder // the location of your files
$ext // file extension you want to limit to (i.e.: *.txt)
$sec // if you only want files that are at least so old.
$limit // number of files you want to return
The function
function glob_files($source_folder, $ext, $sec, $limit){
if( !is_dir( $source_folder ) ) {
die ( "Invalid directory.\n\n" );
}
$FILES = glob($source_folder."\*.".$ext);
$set_limit = 0;
foreach($FILES as $key => $file) {
if( $set_limit == $limit ) break;
if( filemtime( $file ) > $sec ){
$FILE_LIST[$key]['path'] = substr( $file, 0, ( strrpos( $file, "\\" ) +1 ) );
$FILE_LIST[$key]['name'] = substr( $file, ( strrpos( $file, "\\" ) +1 ) );
$FILE_LIST[$key]['size'] = filesize( $file );
$FILE_LIST[$key]['date'] = date('Y-m-d G:i:s', filemtime( $file ) );
$set_limit++;
}
}
if(!empty($FILE_LIST)){
return $FILE_LIST;
} else {
die( "No files found!\n\n" );
}
}
So....
$source_folder = "c:\temp\my_videos";
$ext = "flv"; // flash video files
$sec = "7200"; // files older than 2 hours
$limit = 2; // Only get 2 files
print_r(glob_files($source_folder, $ext, $sec, $limit));
Would return:
Array
(
[0] => Array
(
[path] => c:\temp\my_videos\
[name] => fluffy_bunnies.flv
[size] => 21160480
[date] => 2007-10-30 16:48:05
)
[1] => Array
(
[path] => c:\temp\my_videos\
[name] => synergymx.com.flv
[size] => 14522744
[date] => 2007-10-25 15:34:45
)
Gautam
22-Aug-2007 02:53
22-Aug-2007 02:53
<?php
/*
break :break command exits the innermost loop construct which contains it.
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.
You can view various output by changing comparision operator(<,==,>) or value of $limit
*/
$to_square_root=65536;
$i=1;
$limit=4;
while (true) {
$square_root=sqrt($to_square_root);
echo "Square Root of $to_square_root is $square_root.<BR>";
$to_square_root=$square_root;
$i=$i+1;
if ($i>$limit) // if ($i<$limit) is used, loop breaks on very first execution
break;
}
$loop=$i-1;
echo "This loop is executes for $loop times.";
/* Above codes produces following output in browser
Square Root of 65536 is 256
Square Root of 256 is 16
Square Root of 16 is 4
Square Root of 4 is 2
This loop is executes for 4 times
*/
?>
pinkgothic at gmail dot com
22-Jun-2007 04:10
22-Jun-2007 04:10
To add to the responses given to "vlad at vlad dot neosurge dot net" - I'd like to note the lack of automatic breaking in 'default' can be a very good thing. Consider this useful snippet:
<?php
switch((string) $_REQUEST['mode']) {
default:
$_REQUEST['mode'] = "search";
// fall through...
case 'search' :
case 'list' :
case 'add' :
case 'edit' :
require(dirname(__FILE__)."/incs/".$_REQUEST['mode'].".php");
break;
}
?>
I personally find that far easier to look at than, for example:
<?php
$valid_modes = array('search','list','add','edit');
if (in_array($_REQUEST['mode'],$valid_modes)) {
require(dirname(__FILE__)."/incs/".$_REQUEST['mode'].".php");
} else {
require(dirname(__FILE__)."/incs/search.php");
}
?>
...and it even has the added benefit that the switch() variant only has one require() statement, which makes for easier maintenance, e.g. if the directory changes, or what-have-you.
(Consider the above pseudocode, please, it's not tested - it's code illustrating a point only.)
vinyanov at poczta dot onet dot pl
05-May-2007 05:36
05-May-2007 05:36
Note that the break argument accepts any expression, including a function result. So you may want to dynamically choose the loop level to break from:
<?php
// the print() function returns 1
function icarus()
{
while(print('sea level, '))
while(print('through the clouds, '))
while(print('close the Sun - '))
break rand(print('FEATHERS LOSS! - '), 3);
print('no feathers remaining.');
}
icarus();
?>
18-Jan-2007 06:12
If you wonder how to end execution of a function (as I did), it's that simple: return
function foo($a) {
if(!$a) return;
echo 'true';
// some other code
}
foo(true) will echo 'true', foo(false) won't echo anything (as return ends execution of the function. Of course, therefore there is no need for 'else' before 'echo').
clean_code at is_good_code dot com
08-Nov-2006 12:07
08-Nov-2006 12:07
"Just an insignificant side not: Like in C/C++, it's not necessary to break out of the default part of a switch statement in PHP."
--Yes it is, it's just that traditionally default: is the last entry of a switch and so nothing happens after.
-If it was, for whatever reason, not the last entry the script would bawk, there is no implicit break; associated with switch.
traxer at gmx dot net
30-Dec-2005 06:53
30-Dec-2005 06:53
vlad at vlad dot neosurge dot net wrote on 04-Jan-2003 04:21
> Just an insignificant side not: Like in C/C++, it's not
> necessary to break out of the default part of a switch
> statement in PHP.
It's not necessary to break out of any case of a switch statement in PHP, but if you want only one case to be executed, you have do break out of it (even out of the default case).
Consider this:
<?php
$a = 'Apple';
switch ($a) {
default:
echo '$a is not an orange<br>';
case 'Orange':
echo '$a is an orange';
}
?>
This prints (in PHP 5.0.4 on MS-Windows):
$a is not an orange
$a is an orange
Note that the PHP documentation does not state the default part must be the last case statement.
Ilene Jones
21-Feb-2005 01:08
21-Feb-2005 01:08
For Perl or C programmers...
break is equivelant to last
while(false ! == ($site = $d->read()) ) {
if ($site === 'this') {
break; // in perl this could be last;
}
}