在PHP中删除foreach循环中的项目[重复]

Question

This question already has an answer here:

• How do you remove an array element in a foreach loop? 8 answers

I have a foreach loop where I want to unset an item from an array if certain conditions are met, like this:

foreach ($array as $element) {
    if (conditions) {
        unset($element);
    }
}

But the element is not unset after that. What am I doing wrong? Am I unsetting a reference to the actual element or something like that?

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Answer 1

Simple Solution, unset the element by it's index:

foreach ($array as $key => $element) {
    if (conditions) {
        unset($array[$key]);
    }
}

Just unsetting $element will not work, because this variable is not a reference to the arrays element, but a copy. Accordingly changing the value of $element will not change the array too.