Regular Expressions 101

Community Patterns

5

ipv6

PCRE (PHP <7.3)
Match an ipv6 address
Submitted by Frusty - 8 years ago
9

only numbers

PCRE (PHP <7.3)
A string with only numbers in
Submitted by Gotts - 8 years ago

Validate Base64 single-line string

8

Regular Expression
PCRE (PHP <7.3)

/
^(?:([a-z0-9A-Z+\/]){4})*(?1)(?:(?1)==|(?1){2}=|(?1){3})$
/
mg

Description

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Submitted by ka. - 11 years ago