How to use php to quickly match pictures in articles

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Preg_match_all function:

Int preg_match_all (string pattern, string subject, array matches [, int flags])

Perform a global regular expression match

Search subject for everything that matches the regular expression given by pattern and put the results into matches in the order specified by flags.

After the first match is searched, the next search starts at the end of the previous match.

Flags can be a combination of the following tags (note that it doesn't make sense to combine PREG_PATTERN_ORDER and PREG_SET_ORDER):

PREG_PATTERN_ORDER sorts the results so that $matches [0] is an array of all patterns, $matches [1] is an array of strings matched by the subpatterns in the first parenthesis, and so on!

$pattern= "/