Are there any potential pitfalls to be aware of when manipulating arrays in PHP to combine similar entries?

When manipulating arrays in PHP to combine similar entries, one potential pitfall to be aware of is inadvertently overwriting data if the keys are not unique. To avoid this, you can use the array_merge_recursive function to combine arrays while preserving duplicate keys. 

$array1 = array('fruit' => 'apple', 'color' => 'red');
$array2 = array('fruit' => 'banana', 'shape' => 'curved');

$combinedArray = array_merge_recursive($array1, $array2);

print_r($combinedArray);

Keywords

array_merge array_unique array_count_values array_combine duplicate entries

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