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.
mb_ereg_match
(PHP 4 >= 4.2.0, PHP 5)
mb_ereg_match — Regular expression match for multibyte string
Опис
bool mb_ereg_match
( string
$pattern
, string $string
[, string $option = "msr"
] )A regular expression match for a multibyte string
Значення, що повертаються
Returns TRUE if
string matches the regular expression
pattern, FALSE if not.
Примітки
Зауваження:
The internal encoding or the character encoding specified by mb_regex_encoding() will be used as the character encoding for this function.
Прогляньте Також
- mb_regex_encoding() - Set/Get character encoding for multibyte regex
- mb_ereg() - Regular expression match with multibyte support
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User Contributed Notes 3 notes
Anonymous ¶
8 years ago
Anonymous ¶
15 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
?>
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
?>
