Re: [PHP] 4.3.3-RC1 => possible bug in in_array()?

[Marek Kilimajer]

in_array searches for a value, you suply key. This will work as you expect:

$data = array();
foreach ($this->_array_a as $key => $value) {
        if (! in_array($value, $this->_array_b)
                $data['added'][$key] = $this->_array_a[$key];
}
Branko F. Grac(nar wrote:

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Hi.

I've just found weird thing about in_array() function.

Platform: FreeBSD 5.1/PHP 4.3.3-RC1

Consider this code:

$this->_array_a and $this->_array_b ARE IDENTICAL

                $data = array();
                foreach ($this->_array_a as $key => $value) {
                        if (! in_array($key, $this->_array_b)
                                $data['added'][$key] = $this->_array_a[$key];
                }
Therefore after execution $data should be empty.

But there is whole $this->_array_a in $data after execution...

The following code works ($data is empty after execution):
                foreach ($this->_array_a as $key => $value) {
                        if (! isset($this->_array_b[$key]))
                                $data['added'][$key] = $this->_array_a[$key];
                }
Why is this happening?

Brane
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