php key() function
Translation results：
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() functionsyntax
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() functionexample
Output:
键的当前位置是：0
Output:
1