PHP case-insensitive array search functions [duplicate]

Question

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PHP case-insensitive in_array function

Is it possible to do case-insensitive comparison when using the in_array function?

So with a source array like this:

$a= array(
 'one',
 'two',
 'three',
 'four'
);

The following lookups would all return true:

in_array('one', $a);
in_array('ONE', $a);
in_array('fOUr', $a);

What function or set of functions would do the same? I don't think in_array itself can do this. Because it is case sensitive.

do you assume the array is all lowercase or can the array contain values in any case? — wonk0
– wonk0, Commented Aug 5, 2011 at 12:42

RiaD · Accepted Answer · 2011-08-05 14:18:09Z

6

If you want to apply strtolower on each element of the array, use array_map:

in_array(strtolower('ONE'), array_map('strtolower', $a));

RiaD

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answered Aug 5, 2011 at 12:44

JK.

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1 Comment

Edited to works with any of this strings. @Manikandan: you not really need arary_map here if $a always consist of lowercased strings