Home >Backend Development >PHP Tutorial >Why Does My `preg_match` Fail: Delimiter Discrepancy?

Why Does My `preg_match` Fail: Delimiter Discrepancy?

Barbara Streisand
Barbara StreisandOriginal
2024-12-04 09:09:16832browse

Why Does My `preg_match` Fail: Delimiter Discrepancy?

Delimiter Discrepancy in preg_match

In pattern matching using the preg_match function, a delimiter is crucial to define the beginning and end of the pattern. The provided code snippet attempts to match a pattern but fails due to the absence of a proper delimiter.

The error "Delimiter must not be alphanumeric or backslash" indicates that the provided pattern lacks a non-alphanumeric or non-backslash character to serve as a delimiter. To resolve this issue, a valid delimiter must be incorporated into the pattern.

For instance, the pattern can be modified as follows:

$pattern = "/My name is '(.*)' and im fine/"; // Using "/" as the delimiter

In this example, the forward slash (/) is used as the delimiter. It encloses the pattern, making it recognizable as a valid regular expression.

By incorporating a delimiter into the pattern, the preg_match function can successfully execute the pattern matching operation.

The above is the detailed content of Why Does My `preg_match` Fail: Delimiter Discrepancy?. For more information, please follow other related articles on the PHP Chinese website!

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn