Simple way to identify repeated strings in an array? (PHP)

Question

I have an array with values $somearray = array('car','bike','legs,'car'). I'd like to find out which of these values in $somearray are repeated and pick out the index. In this example the answer would be 'car' and the index of the array would be 0 and 3.

I'm wondering if this can be done simply in a few lines, perhaps using some PHP function that I don't know, or do I need to explicitly make comparison in nested loops?

TIA!

(Array) functions you might not know can be looked up here: http://php.net/manual/en/ref.array.php — Felix Kling, Jun 30 '11 at 00:33

score 3 · Accepted Answer · answered Jun 30 '11 at 00:32

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The solution is pretty simple and I bet you can write it yourself. All you need is just 2 functions: array_count_values() and array_keys() with specified second argument (thanks to @prodigitalson)

answered Jun 30 '11 at 00:32

zerkms

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score 0 · Answer 2 · edited May 23 '17 at 11:55

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There's a good answer on this similar question - How to detect duplicate values in PHP array?

To get the array indexes, I would then filter any array value > 1 and get the indexes

edited May 23 '17 at 11:55

Community

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answered Jun 30 '11 at 00:33

steve

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Simple way to identify repeated strings in an array? (PHP)

2 Answers2