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preg_match_all
Name
preg_match_all — Finds all matches for the supplied pattern and stores them in the supplied array.Description
This function tries to find all the matches for the regular expression pattern in the supplied subject string. Upon a successful search, the previous contents of matches are overwritten with the search results. The matches parameter should be a valid variable, such as$matches, since the function forces it to be passed by reference.
The structure of the search results in matches is specified by the order parameter. order can be either of the following two named constants:
- PREG_PATTERN_ORDER
-
Orders the results so that $matches[0] is an array containing all of the subject string pieces matched by the full pattern, and each subsequent entry is an array containing matches corresponding to the parenthesized subpatterns.
$input = "the work starts at 9:00 am and ends at 6:30 pm"; $num = preg_match_all('/(\d+:\d+)\s*(am|pm)/', $input, $match, PREG_PATTERN_ORDER); echo "full matches: " . implode(', ', $match[0]); echo "time matches: " . implode(', ', $match[1]); echo "meridian matches: " . implode(', ', $match[2]);This example produces the following output:full matches: 9:00 am, 6:30 pm time matches: 9:00, 6:30 meridian matches: am, pm
$match[0] is an array of strings that matched the full pattern, time, and meridian; $match[1] is an array of matched times; and $match[2] is an array of just the meridians.
- PREG_SET_ORDER
-
Orders the results so that $matches[0] is an array of subject string pieces captured by the full pattern and subpatterns on the first match, $matches[1] is an array of pieces captured on the second match, and so on.
$input = "the work starts at 9:00 am and ends at 6:30 pm"; $num = preg_match_all('/(\d+:\d+)\s*(am|pm)/', $input, $match, PREG_SET_ORDER); for ($i = 0; $i < count($match); $i++) { echo "full match: " . $match[$i][0] . "\n"; echo "time match: " . $match[$i][1] . "\n"; echo "meridian match: " . $match[$i][2] . "\n\n"; }This example produces the following output:full match: 9:00 am time match: 9:00 meridian match: am full match: 6:30 pm time match: 6:30 meridian match: pm
In this case, $match[0] is an array containing the pieces captured on the first match, and so on.
Example
Example 1130. Split a string of Hebrew and non-Hebrew characters into an array of words and non-words
<?php
$mixed = ":ƒƒƒƒƒƒƒƒƒ ƒƒƒƒƒƒ ƒƒƒƒƒ
,ƒƒƒƒƒƒƒ ƒƒƒƒ ƒƒƒƒƒƒ (English Text) ƒƒƒƒƒƒƒ ƒƒƒƒƒƒ ƒƒƒƒƒƒƒ ƒƒƒ
.ƒƒƒƒƒƒƒ ƒ ƒƒƒƒƒƒƒƒƒ ƒƒƒ ƒƒ (More English Text) !ƒƒƒƒƒƒƒ ƒƒƒƒƒƒ ƒƒƒƒƒ ƒ ƒ";
// Hebrew characters have hex values between E0 and FB
preg_match_all ("/[\xE0-\xFB]+|[^[:word:]]+|\w+/", $mixed, $matches);
print_r ($matches);
?>
The example produces the following output (remaining 36
entries removed for brevity):
Array
(
[0] => Array
(
[0] => :
[1] => ƒƒƒƒƒƒƒƒƒ
[2] =>
[3] => ƒƒƒƒƒƒ
[4] =>
[5] => ƒƒƒƒƒ
...