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Check for string position instead of string existence
otherwise /foo/bar would be detected as a subfolder of /bar THX @icewind1991
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@ -633,7 +633,7 @@ class OC_Helper {
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* @return bool
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*/
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public static function issubdirectory($sub, $parent) {
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if (strpos(realpath($sub), realpath($parent)) !== false) {
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if (strpos(realpath($sub), realpath($parent)) === 0) {
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return true;
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}
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return false;
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