How to Safely Remove an Array Element While Iterating with a Foreach Loop in PHP?

How to Remove an Array Element While Iterating Using a Foreach Loop

When working with arrays in PHP, it's essential to have control over the elements and their removal. If you encounter the need to check for a specific value within an array and subsequently remove the corresponding element, using a foreach loop is a viable approach.

Consider the following sample code:

foreach($display_related_tags as $tag_name) {
    if($tag_name == $found_tag['name']) {
        // Delete element
    }
}

This code iterates through the $display_related_tags array, checking if each tag name matches the target name stored in $found_tag['name']. Once a match is found, the goal is to remove the element containing this tag name.

To achieve that, you need to retrieve not only the element's value ($tag_name) but also its key within the array. This allows you to specifically target and remove the element you wish to discard. Here's the modified code:

foreach ($display_related_tags as $key => $tag_name) {
    if($tag_name == $found_tag['name']) {
        unset($display_related_tags[$key]);
    }
}

By assigning the key to a variable, you establish a direct reference to the element within the array. Using the unset() function, you can then effectively remove the element from the $display_related_tags array. This way, you can iterate through the array, check for specific values, and promptly delete the corresponding elements without disrupting the flow of the loop.

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