array filter use key
$my_array = ['foo' => 1, 'hello' => 'world'];
$allowed = ['foo', 'bar'];
$filtered = array_filter(
$my_array,
function ($key) use ($allowed) {
return in_array($key, $allowed);
},
ARRAY_FILTER_USE_KEY
);array filter use key
$my_array = ['foo' => 1, 'hello' => 'world'];
$allowed = ['foo', 'bar'];
$filtered = array_filter(
$my_array,
function ($key) use ($allowed) {
return in_array($key, $allowed);
},
ARRAY_FILTER_USE_KEY
);php array filter syntax
$numbers = [2, 4, 6, 8, 10];
function MyFunction($number)
{
return $number > 5;
}
$filteredArray = array_filter($numbers, "MyFunction");
/**
* `$filteredArray` now contains: `[6, 8, 10]`
* NB: Use this to remove what you don't want in the array
* @see `array_map` when you want to alter/change elements
* in the array.
*/php array filter
<?php
$arr = ['a' => 1, 'b' => 2, 'c' => 3, 'd' => 4];
var_dump(array_filter($arr, function($k) {
return $k == 'b';
}, ARRAY_FILTER_USE_KEY));
var_dump(array_filter($arr, function($v, $k) {
return $k == 'b' || $v == 4;
}, ARRAY_FILTER_USE_BOTH));
?>php filter array
$numbers = [-2, 4, -6, 8, 10];
function isPositive($number)
{
return $number > 0;
}
$filteredArray = array_filter($numbers, "isPositive");php array_filter
PHP function array_filter(array $array, ?callable $callback, int $mode = 0) string[]
--------------------------------------------------------------------------------
Iterates over each value in the array passing them to the callback function.
If the callback function returns true, the current value from array is returned into the result array.
Array keys are preserved.
Parameters:
array--$array--The array to iterate over
callable|null--$callback--[optional] The callback function to use If no callback is supplied, all entries of input equal to false (see converting to boolean) will be removed.
int--$mode--[optional] Flag determining what arguments are sent to callback:
ARRAY_FILTER_USE_KEY - pass key as the only argument to callback instead of the value.
ARRAY_FILTER_USE_BOTH - pass both value and key as arguments to callback instead of the value.
Returns: the filtered array.Copyright © 2021 Codeinu
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