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(PHP 4 >= 4.0.5, PHP 5)
array_search — Procura por um valor em um array e retorna sua chave correspondente caso seja encontrado
Procura em haystack por needle .
O valor procurado.
Nota: Se needle for uma string, a comparação é feita de uma maneira que diferencia maiúsculas e minúsculas.
O array.
Se o terceiro parâmetro opcional strict for passado como TRUE então array_search() também fará uma checagem de tipos de needle em haystack .
Retorna a chave para needle se foi encontrada no array, FALSE caso contrário.
Se needle for encontrado em haystack mais de uma vez, a primeira chave que combinar é retornada. Para retornar as chaves para todos os valores que combinar, use array_keys() com o parâmetro opcional search_value .
Esta função pode retornar o booleano FALSE, mas também pode retornar um valor não-booleano que pode ser avaliado como FALSE, como 0 ou "". Leia a seção em Booleanos para maiores informações. Utilize o operador === para testar o valor retornado por esta função.
| Versão | Descrição |
|---|---|
| 4.2.0 | A partir do PHP 4.2.0, array_search() retorna NULL em caso de falha ao invés de FALSE. |
Exemplo #1 Exemplo da array_search()
<?php
$array = array(0 => 'blue', 1 => 'red', 2 => 'green', 3 => 'red');
$key = array_search('green', $array); // $key = 2;
$key = array_search('red', $array); // $key = 1;
?>
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