What could be potential reasons for the error message "Array sizes are inconsistent" when using array_multisort() in PHP?

The error message "Array sizes are inconsistent" occurs when the arrays passed to array_multisort() do not have the same number of elements. To solve this issue, ensure that all arrays have the same number of elements before using array_multisort(). You can use the array_values() function to re-index the arrays if needed. 

$array1 = [3, 1, 2];
$array2 = ['c', 'a', 'b'];
$array3 = [30, 10, 20];

// Ensure all arrays have the same number of elements
$array1 = array_values($array1);
$array2 = array_values($array2);
$array3 = array_values($array3);

// Perform array_multisort()
array_multisort($array1, $array2, $array3);

// Output sorted arrays
print_r($array1);
print_r($array2);
print_r($array3);

Keywords

array_multisort PHP error message inconsistent array sizes

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