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    mb_ereg_match

    (PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)

    mb_ereg_match — Regular expression match for multibyte string

    说明

    mb_ereg_match(string $pattern, string $string, ?string $options = null): bool

    A regular expression match for a multibyte string

    注意: pattern is only matched at the beginning of string.

    参数

    pattern

    The regular expression pattern.

    string

    The string being evaluated.

    options

    The search option. See mb_regex_set_options() for explanation.

    返回值

    Returns true if string matches the regular expression pattern, false if not.

    更新日志

    版本 说明
    8.0.0 options is nullable now.

    注释

    注意:

    mb_regex_encoding() 指定的内部编码或字符编码将会当作此函数用的字符编码。

    参见

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    User Contributed Notes 3 notes

    up
    9
    Anonymous
    8 years ago
    The behaviour of mb_ereg_match to imply a ^ at the beginning of the pattern stands in stark contrast to the behaviour of mb_ereg where ^ is NOT implied.

    Switching between those two routines (because the need to extract a subpattern changes) requires careful consideration when to compensate for this surprising inconsistence.
    up
    8
    Anonymous
    16 years ago
    Note that this function matches a string from the beginning only (though not necessarily till the end):

    <?php

    $test     = mb_ereg_match("a", "some apples"); // returns false
    $test = mb_ereg_match("a", "a kiwi");      // returns true

    ?>

    If you want to check for a match anywhere in the string, use the wild-card & repeat operators .*

    <?php

    $test     = mb_ereg_match(".*a", "some apples"); // returns true

    ?>
    up
    -1
    webdesign at innato dot nl
    5 years ago
    It took me a while to discover that you must escape characters like parentheses (), square brackets [] and ^ (and maybe more) if you want to match these as a literal. Otherwise you may get some erratic outcome.

    In summary, using a match anywhere in the string as an example:

    <?php
    $needle     = "[";
    $haystack = "some_array[]";
    $test= mb_ereg_match(".*".$needle, $haystack);   // returns false and a php warning

    $test= mb_ereg_match('.*'.preg_quote($needle), $haystack);   // returns true
    ?>
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