How Can I Permanently Modify Array Values Using a Foreach Loop in PHP?

Modifying Array Values Using Foreach Loop

In PHP, iterating through arrays using foreach loops can be useful for processing and modifying elements. However, modifying array values within the loop may not always yield permanent changes. For instance, using the strip_tags() function to remove HTML tags from values might not have a lasting effect.

Permanent Modification Techniques

To ensure permanent changes to array values, consider the following techniques:

1. Modifying Memory Reference:

   • Accessing the value directly through a memory reference allows for permanent modification.
   • Syntax: foreach ($bizaddarray as &$value) {}
   • This technique modifies the memory location of the value, resulting in permanent changes.

2. Using Source Array:

   • Accessing the value through the source array also enables permanent modification.
   • Syntax: foreach ($bizaddarray as $key => $value) {}
   • In this approach, the value is updated within the source array, guaranteeing permanent changes.

Example:

$bizaddarray = ['<p>Test</p>', '<div>Example</div>'];

// Modify using memory reference
foreach ($bizaddarray as &amp;$value) {
    $value = strip_tags(ucwords(strtolower($value)));
}
unset($value); // Remove reference

// Modify using source array
foreach ($bizaddarray as $key => $value) {
    $bizaddarray[$key] = strip_tags(ucwords(strtolower($value)));
}

// Convert to string
$result = implode(', ', $bizaddarray);

echo $result; // Output: Test, Example

In both cases, the HTML tags are permanently removed from the array values, resulting in the desired output without any residual tags.

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