What is the purpose of using array_diff in PHP when comparing two MySQL tables?

When comparing two MySQL tables in PHP, the array_diff function can be used to find the differences between the two tables. This function will return an array containing all the values from the first table that are not present in the second table. This can be useful for identifying missing or extra rows in the tables. 

$table1 = ['A', 'B', 'C', 'D'];
$table2 = ['A', 'C', 'D', 'E'];

$missingRows = array_diff($table1, $table2);

foreach($missingRows as $row) {
    echo "Row '$row' is missing from table2.\n";
}

Keywords

PHP array_diff MySQL tables comparison

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