a2enmod rewrite headers
==== RewriteMap definieren ====
Die ReweriteMap darf nicht innerhalb der Elemente
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RewriteEngine On
RewriteMap shibchecker "prg:/usr/bin/php /PATH/TO/shibchecker.php"
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Windows:
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RewriteEngine On
RewriteMap shibchecker "prg:c:/PATH/TO/php.exe c:/PATH/TO/shibchecker.php"
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