Поиск строки PHP в многомерном массиве
Я только начал разбираться с PHP (новым для PHP) кодированием, связанным с Pinterest. Я застрял при выполнении поиска строки по многомерным массивам. Я провел много исследований и пробовал разные вещи, но не смог найти большой помощи в поиске строк по многомерным массивам.
В частности, Я пробовал рекурсивный поиск по массиву из этого поста: in_array () и многомерный массив но это не сработало для меня. Возможно, я делаю что-то не так, поэтому я здесь, чтобы найти помощь экспертов PHP.
Когда я запускаю его против моего многомерного массива (упомянуто ниже) Я получаю ответ каждый раз, и неважно, какую строку я укажу.
Например: если я запускаю приведенный ниже код, и он говорит, что нашел, хотя он должен сказать, что не найден, потому что есть Irix слово в моем многомерном массиве.
echo in_array_r("Irix", $info) ? 'found' : 'not found';
Ниже мой многомерный массив:
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Решение
В результате вы получаете жонглирование типов PHP при слабом сравнении значений другого типа.
Попробуйте это, например:
$x = ('Irix' == 0 );
var_export( $x );
Ты получаешь TRUE !
Зачем?
'Irix' превращается в intпосле преобразования 0 так что сравнивается с 0,
В вашем массиве у вас есть несколько значений 0 вот почему Irix видимо найден.
Вы должны использовать строгий сравнение при вызове функции:
function in_array_r($needle, $haystack, $strict = false) {
foreach ($haystack as $item) {
if (($strict ? $item === $needle : $item == $needle) || (is_array($item) && in_array_r($needle, $item, $strict))) {
return true;
}
}
return false;
}
Если вам нужно использовать слабое сравнение (чтобы соответствовать 123 == '123' например) вы можете настроить функцию для приведения числа к строкам и выполнить слабое сравнение:
function in_array_r($needle, $haystack, $strict = false) {
foreach ($haystack as $item) {
// cast $item to string if numeric when doing weak comparison
if( ! $strict && is_string( $needle ) && ( is_float( $item ) || is_int( $item ) ) ) {
$item = (string)$item;
}
// ----------------------------------------------------------
if (($strict ? $item === $needle : $item == $needle) || (is_array($item) && in_array_r($needle, $item, $strict))) {
return true;
}
}
return false;
}
Наконец, если вам нужно также оценить истинные совпадения подстрок (например, find "example" в строку "this is a example") функция такая:
function in_array_r($needle, $haystack, $strict = false) {
foreach ($haystack as $item) {
// cast $item to string if numeric when doing weak comparison
if( ! $strict && is_string( $needle ) && ( is_float( $item ) || is_int( $item ) ) ) {
$item = (string)$item;
}
// ----------------------------------------------------------
// Substring search
if( is_string( $needle ) && is_string( $item ) && strpos( $item, $needle ) !== false ) {
return true;
}
// ----------------
if (($strict ? $item === $needle : $item == $needle) || (is_array($item) && in_array_r($needle, $item, $strict))) {
return true;
}
}
return false;
}
Конкурировать демо-код доступен Вот
Другие решения
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