Question

As taken from https://stackoverflow.com/questions/4891301/top-bad-practices-in-php

Is this similar code killing kittens, too?

foreach (file("longFile.txt") as $line) {
    // ouch! Kitten killed
}

??

For those who have no idea what am I talking about:

Is PHP getting longFile.txt everytime it goes to next line of file or no? Talking about this code:

foreach (file("longFile.txt") as $line) {
        // something
}

Answer 1

In the linked question the for loop incurs a performance hit by calling count on every iteration. foreach uses internal pointers to iterate through the array passed to it.

In your example file() will be called once and the resulting array will be passed to foreach which will iterate through it, thus the kittens are saved. Happy Caturday!