PHP array Difference value of four function learning

$array 1 = Array ("A" = "green", "Red", "blue"); $array 2 = Array ("b" = "green", "yellow", "red"); $result = Array_intersect ($array 1, $array 2); ?> Copy Code The example above will output: Array ([a] = green[0] + red) 2.ARRAY_INTERSECT_ASSOC () returns a key-value pair with the same key and value in all arrays, based on the previous function. Example: $array 1 = Array ("A" = "green", "b" = "Brown", "c" = "blue", "Red"); $array 2 = Array ("A" = "green", "yellow", "red"); $result _array = Array_intersect_assoc ($array 1, $array 2); ?> Copy Code The example above will output: Array ([a] = green) 3.array_diff () carries multiple arrays, returning a new array of all the values in the first array that are not in the following array, and the corresponding key is taken from the first array. Example: $array 1 = Array ("A" = "green", "Red", "Blue", "Red"); $array 2 = Array ("b" = "green", "yellow", "red"); $result = Array_diff ($array 1, $array 2); Print_r ($result); ?> Copy Code The example above will output: Array ([1] = blue) 4.array_diff_assoc () on the basis of the previous function, it is necessary to match not only the value but also the key. Example: $array 1 = Array ("A" = "green", "b" = "Brown", "c" = "blue", "Red"); $array 2 = Array ("A" = "green", "yellow", "red"); $result = Array_diff_assoc ($array 1, $array 2); ?> Copy Code The example above will output: Array ( = = Brown[c] = blue[0] = red)

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