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PHP Regular Expressions
PHP Regular Expressions Tutorials
47 tutorials found.
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(?<= Pattern)
Lookbehind | Positive Lookbehind | PHP
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(?= Pattern)
Lookahead | Positive Lookahead | PHP
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/ Delimiter
Pattern Delimiters | Forward Slash | PHP
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Alphanumeric Underscore
Username Validation | Username Regex | PHP
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Any Character in Set
Character Classes | Square Brackets | PHP
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Any Single Character
Metacharacters | Dot | PHP
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Case Insensitive
Modifiers | i Modifier | PHP
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Complex Password Pattern
Password Validation | Password Strength Regex | PHP
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d Character
Shortcut Classes | Digits | PHP
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OR Operator
Alternation | Vertical Bar | PHP
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Parentheses Capture
Groups | Capturing Group | PHP
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Perform Regex Match
PREG Functions | preg_match | PHP
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Validate Email Format
Email Validation | Email Regex Pattern | PHP
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Validate IPv4 IPv6
IP Validation | IP Address Regex | PHP
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Validate Phone Number
Phone Validation | Phone Regex Pattern | PHP
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Validate URL Format
URL Validation | URL Regex Pattern | PHP
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(?: Pattern)
Groups | Non Capturing Group | PHP
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(?! Pattern)
Lookahead | Negative Lookahead | PHP
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(?<! Pattern)
Lookbehind | Negative Lookbehind | PHP
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# Delimiter
Pattern Delimiters | Hash Symbol | PHP
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Caret Inside Brackets
Character Classes | Negated Class | PHP
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D Character
Shortcut Classes | Non Digits | PHP
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Multiline Mode
Modifiers | m Modifier | PHP
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Perform Global Match
PREG Functions | preg_match_all | PHP
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Start of String
Metacharacters | Caret | PHP
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~ Delimiter
Pattern Delimiters | Tilde | PHP
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A to Z Range
Character Classes | Range Hyphen | PHP
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Dot Matches Newline
Modifiers | s Modifier | PHP
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End of String
Metacharacters | Dollar | PHP
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P Name Pattern
Groups | Named Group | PHP
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Search Replace Regex
PREG Functions | preg_replace | PHP
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w Character
Shortcut Classes | Word Characters | PHP
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Ignore Whitespace
Modifiers | x Modifier | PHP
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Number Reference
Groups | Backreference | PHP
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Replace with Callback
PREG Functions | preg_replace_callback | PHP
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W Character
Shortcut Classes | Non Word | PHP
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Zero or More Times
Metacharacters | Asterisk | PHP
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One or More Times
Metacharacters | Plus | PHP
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s Character
Shortcut Classes | Whitespace | PHP
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Split String by Pattern
PREG Functions | preg_split | PHP
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UTF-8 Mode
Modifiers | u Modifier | PHP
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Filter Array by Pattern
PREG Functions | preg_grep | PHP
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S Character
Shortcut Classes | Non Whitespace | PHP
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Zero or One Time
Metacharacters | Question Mark | PHP
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Escape Regex Characters
PREG Functions | preg_quote | PHP
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Exact Number of Times
Metacharacters | Curly Braces | PHP
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Get Last Regex Error
PREG Functions | preg_last_error | PHP