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.

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