The \A, \Z, and \z assertions differ from the traditional circumflex and dollar (described in the next section) in that they only ever match at the very start and end of the subject string, whatever options are set. Thus, they are independent of multiline mode. These three assertions are not affected by the PCRE_NOTBOL or PCRE_NOTEOL options, which affect only the behaviour of the circumflex and dollar metacharacters. However, if the startoffset argument of pcre_exec() is non-zero, indicating that matching is to start at a point other than the beginning of the subject, \A can never match. The difference between \Z and \z is that \Z matches before a newline at the end of the string as well as at the very end, whereas \z matches only at the end.

[Router] added \Z as regex end for route requirement

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carsonbot added Status: Needs Review Routing Feature labels

Jul 31, 2020

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nicolas-grekas commentedAug 1, 2020

This looks like unneeded precaution to me. New lines are not legit in URLs.

nicolas-grekas added this to thenext milestone

Aug 1, 2020

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Aug 1, 2020

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src/Symfony/Component/Routing/Route.php


		if ('$' ===substr($regex, -1)) {
		$regex =substr($regex,0, -1);
		}elseif (\strlen($regex) -2 ===strpos($regex,'\\z')) {

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nicolas-grekasAug 1, 2020

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Unrelated to the PR: couldn't this be written as this?
} elseif (false !== strpos($regex, '\\z', -2)) {

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zlodesAug 3, 2020•
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@nicolas-grekas triedstrpos andstrrpos:

strpos(): Offset not contained in string in .... (strpos doesn't accept negative offset)
strrpos(): Offset is greater than the length of haystack string