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Php according to key delete array elements method: 1, use unset () function, syntax "unset ($array [key value])"; 2, use array_diff_key () function, syntax "array_diff_key ($array, [key value = >"]) ".

Operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

Php deletes array elements based on key (key name)

Method 1: use the unset () function to delete the element based on the key name of the array element

Method 2: use the array_diff_key () function to delete the element based on the key name of the array element

If you know the key of the array element to be deleted, you can use array_diff_key (). You need to enter the key to delete in the key position of the second parameter of the function, and the value is optional.

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