I have an array like this: $array = ['cat' => 0, 'dog' => 1]; I have a string like this: $string = 'I like cats.'; I want to see if any keys in the array are found in the string; if so, I w...

I have found that array_key_exists is over 1000x slower than isset at check if a key is set in an array reference. Does anyone that has an understanding of how PHP is implemented explain why this i...

I've seen a lot of people do the former, is there any performance benefit doing one vs the other? Or is it just an eye candy? I personally use the latter every time as it is shorter and personally ...