Can you provide examples of best practices for efficiently managing arrays in PHP to avoid performance issues?

When managing arrays in PHP, it is important to avoid performance issues by using best practices such as limiting unnecessary array manipulation operations, optimizing loops, and utilizing built-in array functions efficiently. One common mistake is repeatedly calling count() within loops, which can impact performance. Instead, store the count value in a variable before the loop to avoid recalculating it. 

// Inefficient way to loop through an array
foreach ($array as $item) {
    // Do something
}

// Efficient way to loop through an array
$count = count($array);
for ($i = 0; $i < $count; $i++) {
    $item = $array[$i];
    // Do something
}

Keywords

array_merge array_slice unset array_key_exists array_map

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