Preconditions and environment

• Magento 2.4.x

Steps to reproduce

In \Magento\Framework\Escaper::escapeScriptIdentifiers:

Here and here, $filteredData === false will never be met since preg_replace only returns string|array|null.

See preg_replace documentation.

Expected result

Check if $filteredData is NULL.

Actual result

Check if $filteredData is false.

Additional information

Related commit.
#23988

Release note

No response

Triage and priority

• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.