preg_match_all « String « PHP

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A non-capturing optional subpattern

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Capturing HTML headings

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preg_match_all demo

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preg_match_all searches a string for all the occurrences of a regular expression

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preg_match_all() function matches all occurrences of pattern in string.

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Finding Matches Globally with preg_match_all()

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Matching with preg_match_all()

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Using preg_match_all() to Match a Pattern Globally

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Using preg functions

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Extracting text from HTML tags

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Finding the nth match

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Making a quantifier match as few characters as possible

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m modifier: match an anchored pattern on multiple lines of text.

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Reading Records with a Delimiter