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function array_diff($array_1, $array_2) {
$diff = array();
foreach ($array_1 as $k => $v1) {
$flag = false;
foreach ($array_2 as $v2) {
if ($flag = ($v1 == $v2)) {
break;
}
}
if (!$flag) {
$diff[$k] = $v1;
}
}
return $diff;
}
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function array_diff($array_1, $array_2) {
foreach ($array_1 as $key => $item) {
if (in_array($item, $array_2, true)) {
unset($array_1[$key]);
}
}
return $array_1;
}
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function array_diff($array_1, $array_2) {
$array_2 = array_flip($array_2);
foreach ($array_1 as $key => $item) {
if (isset($array_2[$item])) {
unset($array_1[$key]);
}
}
return $array_1;
}
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