filter_var

    (PHP 5 >= 5.2.0, PHP 7, PHP 8)

    filter_var — Filters a variable with a specified filter

    Descrição

    filter_var(mixed$value, int$filter = FILTER_DEFAULT, array|int$options = 0): mixed

    Parâmetros

    value

    Value to filter. Note that scalar values are converted to string internally before they are filtered.

    filter

    O ID do filtro a ser aplicado. A página do manual Tipos de filtros lista os filtros disponíveis.

    Se omitido, FILTER_DEFAULT será usado, que é equivalente a FILTER_UNSAFE_RAW. Isso resultará em nenhuma filtragem ocorrendo por padrão.

    options

    Associative array of options or bitwise disjunction of flags. If filter accepts options, flags can be provided in "flags" field of array. For the "callback" filter, callable type should be passed. The callback must accept one argument, the value to be filtered, and return the value after filtering/sanitizing it.

    <?php
    // for filters that accept options, use this format
    $options = array(
    'options' => array(
    'default' => 3, // value to return if the filter fails

    Valor Retornado

    Returns the filtered data, or false if the filter fails.

    Exemplos

    Exemplo #1 A filter_var() example

    <?php
    var_dump    (filter_var('bob@example.com', FILTER_VALIDATE_EMAIL));
    var_dump(filter_var('http://example.com', FILTER_VALIDATE_URL, FILTER_FLAG_PATH_REQUIRED));
    ?>

    O exemplo acima produzirá:

    string(15) "bob@example.com" bool(false)

    Exemplo #2 Filter an array example

    <?php
    $emails     = [
    "bob@example.com",
    "test@example.local",
    "invalidemail"
    ];

    var_dump(filter_var($emails, FILTER_VALIDATE_EMAIL, FILTER_REQUIRE_ARRAY));
    ?>

    O exemplo acima produzirá:

    array(3) { [0]=> string(15) "bob@example.com" [1]=> string(18) "test@example.local" [2]=> bool(false) }

    Veja Também

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