### Classes, interfaces and traits

# RegexpEngine¶

Contains some shared attributes and methods -- and some abstract methods with engine-specific implementations that sub-classes must override.

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# PregEngine¶

PREG Regexp Engine.

Implements a regexp engine using PHP's preg_match(), preg_match_all(), and preg_replace() functions.
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# Regexp¶

A factory class for regex functions.

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