PHP preg_match()

Perform regular expression match

Function Signature

int|false preg_match(string $pattern, string $subject, array &$matches = null)

Description

Perform regular expression match. The preg_match() function is commonly used in PHP for regex operations and provides reliable functionality across all PHP versions.

Return Value

Returns 1 if match found, 0 if not, false on error

Example Usage

Important Notes

Use preg_match_all() for all matches. Matches stored in third parameter.

Common Use Cases

The preg_match() function is particularly useful when you need to perform regular expression match. It's frequently used in data processing, validation, transformation, and manipulation tasks throughout PHP applications.

preg_match() FAQ

What does preg_match() return?

Returns 1 if match found, 0 if not, false on error

When should I use preg_match()?

Use preg_match() when you need to perform regular expression match in your PHP code. It's a reliable built-in function available in all PHP versions.

Are there any gotchas with preg_match()?

Use preg_match_all() for all matches. Matches stored in third parameter.