UK[ki:] US[ki]

n.Key; (of a typewriter, etc.) key; key, clue, secret; (of music) key

vt.Type; Lock; adjust the tone of...; provide clues

vi. Use keys

adj. Critical; main

Third person singular: keys Plural: keys Present participle: keying past tense: keyed past participle: keyed

php key() function syntax

Function:Returns the key name of the element currently pointed to by the internal pointer of the array.

Syntax:key(array)

Parameters:

Parameter Description
array Required. Specifies the array to use.

Description:Returns the key name of the element currently pointed to by the internal pointer of the array. If an error occurs, the function returns FALSE.

php key() function example


Run instance»

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Output:

键的当前位置是：0



Run Instance»

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Output:

1