In the provided PHP code snippet, what potential issue arises when using the preg_quote() function without specifying the delimiter parameter?

When using the preg_quote() function without specifying the delimiter parameter, the function may escape characters that are not intended to be escaped. This can lead to unexpected behavior in regular expressions. To solve this issue, it is important to specify the delimiter parameter to ensure that only the necessary characters are escaped. 

// Potential issue: using preg_quote() without specifying the delimiter parameter
$pattern = preg_quote('example.com', '/');
echo $pattern; // outputs: example\.com

// Fix: specify the delimiter parameter to avoid escaping unintended characters
$pattern = preg_quote('example.com', '/');
echo $pattern; // outputs: example\.com

Keywords

PHP preg_quote() delimiter regular expression escaping

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