What are some best practices for optimizing nested loops in PHP to avoid performance issues?

Optimizing nested loops in PHP involves minimizing the number of iterations and reducing unnecessary computations within the loops. One way to achieve this is by breaking out of inner loops early if possible or using alternative data structures to avoid nested loops altogether. 

// Example of optimizing nested loops by breaking out early
$array1 = [1, 2, 3, 4, 5];
$array2 = [6, 7, 8, 9, 10];

foreach ($array1 as $value1) {
    foreach ($array2 as $value2) {
        if ($value1 + $value2 === 10) {
            echo "Found pair: $value1, $value2\n";
            break 2; // Break out of both loops
        }
    }
}

Keywords

PHP nested loops optimization performance efficiency

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