While Loop Through An Array - php

Question

Creating a block builder that loops through blocks pulled form database in order.
if( loop_blocks()) {
while( loop_blocks()) {
if( have_block('standard-content-block')) {
echo 'standard-content-block';
}
elseif( have_block('executive-intro-block')) {
echo 'executive intro block';
}
}
}
My function loop_blocks pulls the blocks from the database in order and set the array as a global variable:
function loop_blocks() {
global $db;
$page_id = get_page_id();
$GLOBALS['loop_position'] = 0;
$loop_position = $GLOBALS['loop_position'];
$stm = $db->prepare("SELECT * FROM page_blocks WHERE page_id = :id ORDER BY `block_order` ASC");
$stm->execute(array(':id' => $page_id));
$res = $stm->fetchAll();
$GLOBALS['block_loop'] = $res;
if(!$res) {
return false;
} elseif(!$GLOBALS['block_loop'][$loop_position]) {
return false;
} else {
return true;
}
}
The function have_block gets the current loop position and determines whether the name as determined, exists in the array and increases the loop position:
function have_block($block_name) {
$loop_position = $GLOBALS['loop_position'];
if(!$GLOBALS['block_loop'][$loop_position]) {
return false;
} elseif(!$GLOBALS['block_loop'][$loop_position][block_name] = $block_name) {
return false;
} else {
$GLOBALS['loop_position'] = $loop_position+1;
return true;
}
}
This returns an infinite loop however and I can't figure out a way to move the while loop onto the next step?
EDIT I'm using a while loop because the function have_block will set-up a global variable for the current block id. This will then be used within a function called the_element. Such as:
if( loop_blocks()) {
while( loop_blocks()) {
if( have_block('standard-content-block')) {
the_element('heading');
}
}
}
If I don't use the function have_block to set this up, then I'd need to pass the block id from the foreach loop into every element as a second argument.

Answer 1

I fixed this by, as #Jim, noted I was re-setting the loop_position within loop_blocks() which was why the while loop was repeating infinitely. It was then a simple case of an error when typing:
} elseif(!$GLOBALS['block_loop'][$loop_position][block_name] = $block_name) {
return false;
Should have been:
} elseif($GLOBALS['block_loop'][$loop_position][block_name] != $block_name) {
return false;
Note that I had the exclamation point in the incorrect place.
This now works perfectly as I need.