PHP Foreach , Where - php

Question

Is there a way of adding a where class to a foreach equation in PHP.
At the moment I am adding an if to the foreach like this.
<?php foreach($themes as $theme){
if($theme['section'] == 'headcontent'){
//Something
}
}?>
<?php foreach($themes as $theme){
if($theme['section'] == 'main content'){
//Something
}
}?>
Presumably the PHP has to loop through all results for each of these. Is there are more efficient way of doing this. Something like
foreach($themes as $theme where $theme['section'] == 'headcontent')
Can this be done

Answer 1

A "foreach-where" would be exactly the same as a "foreach-if", because anyway PHP has to loop through all items to check for the condition.
You can write it on one line to reflect the "where" spirit:
foreach ($themes as $theme) if ($theme['section'] == 'headcontent') {
// Something
}
This becomes really the same as the construct suggested at the end of the question; you can read/understand it the same way.
It does not, however, address the fact that in the question's specific scenario, using any kind of "foreach-where" construction would in effect loop through all items several times. The answer to that lies in regrouping all the tests and corresponding treatments into a single loop.

Answer 2

Use a SWITCH Statement.
<?php
foreach($themes as $theme)
{
switch($theme['section'])
{
case 'headcontent':
//do something
break;
case 'main content':
//do something
break;
}
}
?>

Answer 3

You better use for loop for that like
<?php
$cnt = count($themes);
for($i = 0;$i < $cnt,$themes[$i]['section'] == 'headcontent' ;$i++){
}
?>

Answer 4

If someone uses MVC framework ,the answer to "foreach where" is here
<?php foreach ($plans as $plan) if ($plan['type'] == 'upgrade'): ?>
// Your code here
<?php endif; ?>
Remeber there is no need for the endforeach; statement after endif;
If someone wants to write more code between endif; and endforeach; then the above should be:
<?php foreach ($plans as $plan): if ($plan['type'] == 'upgrade'): ?>
// Your code here
<?php endif; ?>
// More of your code
<?php endforeach; ?>