Array query - finding the key for a value

This may be a silly question, but I'm used to being able to find PHP functions to do whatever I want, but I can't find one to do this! If I have an array like this: [0] -> 'apple'; [1] -> 'pear'; [2] -> 'orange'; [3] -> 'apricot'; I know I can use in_array() to check whether, say, 'orange' is in the array; but how do I then find out which index 'orange' is at? -- Tim Fountain (tim@tfountain.co.uk) http://www.tfountain.co.uk/