What is the common cause of the "Array" output error in PHP files?

The common cause of the "Array" output error in PHP files is when you try to echo an array directly without converting it to a string first. To solve this issue, you can use the print_r() or var_dump() functions to display the contents of the array. 

$array = [1, 2, 3, 4, 5];
print_r($array);

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Array output error PHP files common cause error types

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