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Home/ Questions/Q 6178241
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Editorial Team
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Editorial Team
Asked: May 24, 20262026-05-24T00:25:26+00:00 2026-05-24T00:25:26+00:00

Can I pass false as a needle to in_array() ? if(in_array(false,$haystack_array)){ return ‘!’; }else{

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Can I pass false as a needle to in_array()?

if(in_array(false,$haystack_array)){
    return '!';
}else{
    return 'C';
}

The $haystack_array will contain only boolean values. The haystack represents the results of multiple write queries. I’m trying to find out if any of them returned false, and therefore not completed.

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  1. Editorial Team
    Editorial Team
    2026-05-24T00:25:27+00:00Added an answer on May 24, 2026 at 12:25 am

    PHP won’t care what you pass in as your ‘needle’, but you should probably also use the third (optional) parameter for in_array to make it a ‘strict’ comparison. ‘false’ in PHP will test as equal to 0, '', "", null, etc…

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