Top "Array-key-exists" questions

PHP function that checks if the given key or index exists in the array

array_key_exists($key, $array) vs !empty($array[$key])

I've seen a lot of people do the former, is there any performance benefit doing one vs the other? Or …

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php arrays array-key-exists
Why is array_key_exists 1000x slower than isset on referenced arrays?

I have found that array_key_exists is over 1000x slower than isset at check if a key is set …

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php performance reference isset array-key-exists
array_key_exists() expects parameter 2 to be array

My Wordpress page (yarnhk.com) appears the following lines: Warning: array_key_exists() expects parameter 2 to be array, string given …

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php wordpress array-key-exists
check if a value exists in array

I am trying this code to check if a value exists in an array. $arr = array ('2' => '0…

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php arrays array-key-exists
PHP array_key_exists does not work; array is not multi-dimensional

I have an array of all the countries in the world as such: $countries = array( "GB" => "United Kingdom", "US" =&…

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php html arrays forms array-key-exists