mb_ereg_match()

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

Regular expression match for multibyte string

说明

A regular expression match for a multibyte string

参数

The regular expression pattern.

The string being evaluated.

The search option. See mb_regex_set_options() for explanation.

返回值

Returns TRUE if$stringmatches the regular expression$pattern,FALSE if not.

注释

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

• mb_regex_encoding()Set/Get character encoding for multibyte regex
• mb_ereg()Regular expression match with multibyte support

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.

Note that this function matches a string from the beginning only (though not necessarily till the end):

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

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: 

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