Differences from POSIX regex
Introduction
Șabloane PCRE
PHP Manual
Pattern Syntax
Cuprins
Introduction
Delimiters
Meta-characters
Escape sequences
Unicode character properties
Anchors
Dot
Character classes
Alternation
Internal option setting
Subpatterns
Repetition
Back references
Assertions
Once-only subpatterns
Conditional subpatterns
Comments
Recursive patterns
Performance
Differences from POSIX regex
Introduction
Șabloane PCRE
PHP Manual