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<?php $x = "Umläüts & test!"; $y = htmlspecialchars($x); var_dump(htmlspecialchars($x)); var_dump(htmlspecialchars($y)); var_dump(htmlspecialchars_decode($x)); var_dump(htmlspecialchars_decode($y)); $converted = htmlspecialchars($y); var_dump('Y', $converted); do { $oldConverted = $converted; $converted = htmlspecialchars_decode($converted); } while( $converted != $oldConverted ); var_dump($converted);
Output for git.master, git.master_jit, rfc.property-hooks
string(21) "Umläüts &amp; test!" string(25) "Umläüts &amp;amp; test!" string(17) "Umläüts & test!" string(17) "Umläüts & test!" string(1) "Y" string(25) "Umläüts &amp;amp; test!" string(17) "Umläüts & test!"

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