What is the potential issue with nesting multiple foreach loops in PHP when trying to process arrays within arrays?

The potential issue with nesting multiple foreach loops in PHP when trying to process arrays within arrays is that it can lead to nested loops iterating over each other's elements, causing unexpected behavior or errors. To solve this issue, you can use array_keys() to get the keys of the inner array and then iterate over those keys in the outer loop to access the corresponding values. 

// Example of fixing nested foreach loops issue
$outerArray = [
    'key1' => ['value1', 'value2'],
    'key2' => ['value3', 'value4']
];

foreach ($outerArray as $key => $innerArray) {
    echo "Outer key: $key\n";
    
    foreach (array_keys($innerArray) as $innerKey) {
        echo "Inner key: $innerKey, Inner value: {$innerArray[$innerKey]}\n";
    }
}

Keywords

foreach nested loops arrays processing PHP

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