What potential issues can arise from using multiple nested loops in PHP code?

Potential issues that can arise from using multiple nested loops in PHP code include decreased performance due to increased computational complexity and potential difficulties in code readability and maintenance. To solve these issues, consider refactoring the nested loops into separate functions or using alternative data structures to reduce the number of nested loops.

// Example of refactoring nested loops into separate functions
function processNestedArray($nestedArray) {
    foreach ($nestedArray as $array) {
        processArray($array);
    }
}

function processArray($array) {
    foreach ($array as $element) {
        // Process each element
    }
}

// Usage
$nestedArray = [[1, 2, 3], [4, 5, 6], [7, 8, 9]];
processNestedArray($nestedArray);