Counting PHP array values, only first one works?

Question

Here is my array:

print_r($mCOneC);

=> Array ( [0] => start [1] => Trial [2] => Refusal [3] => Expel [4] => Mouth Clean )

If I do:

$length = count( array_keys( $mCOneC, 'start' ));

echo $length;

I get: 1

If I do:

$length = count( array_keys( $mCOneC, 'Trial' ));

echo $length;

I get: 0

Any reason why this is not working?

Please help us by providing how you defined (built) your array. — matthias
– matthias, Commented Oct 24, 2012 at 14:46
I cannot reproduce this problem. How do you create the array? — F.P
– F.P, Commented Oct 24, 2012 at 14:48
Are you sure the Trial value in the array isn't Trial[space] or otherwise has an invisible/unprintable character in it, making it something OTHER than Trial? a var_dump of the array will show its string length, and it SHOULD be 5. if it's not, then it's not just 'Trial'. — Marc B
– Marc B, Commented Oct 24, 2012 at 14:49
Array was built from a db result: $mCOneC = $row['mCOneC']; $mCOneC = explode(",",$mCOneC); — user1041931
– user1041931, Commented Oct 24, 2012 at 14:51

hakre · Accepted Answer · 2012-10-24 14:51:03Z

1

The array_keys does not lie to you. For your second example you're having an issue with returning zero:

count(array_keys($mCOneC, 'Trial'));

This just means that the array $mCOneC does not contain any string that is exactly 'Trial'. You need to more thoroughly inspect the original data why it does not match, for example with the var_dump function on the concrete value:

var_dump($mCOneC[1]);

This should shed more light into your issue. The print_r function you use is not that specific as var_dump. Also take care when viewing things inside the browser window, take a look into the source-view of your browser, too. It's displaying things better than the browser window when you need to debug.

answered Oct 24, 2012 at 14:51

hakre

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Baba · Accepted Answer · 2012-10-24 14:50:45Z

0

Simple you are dealing with space

$mCOneC = Array(
        0 => "start",
        1 => "Trial ",
        2 => "Refusal",
        3 => "Expel",
        4 => "Mouth Clean");


$mCOneC = array_map("trim", $mCOneC); <------------- Fix Spaces
$length = count( array_keys( $mCOneC, 'start' ));
var_dump($length);


$length = count( array_keys( $mCOneC, 'Trial' ));
var_dump($length);

answered Oct 24, 2012 at 14:50

Baba

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