Identical to fgets(), except that fgetss attempts to strip any HTML and PHP tags from the text it reads.
You can use the optional third parameter to specify tags which should not be stripped.
注: allowable_tags was added in PHP 3.0.13, PHP 4.0.0.
Parameter length is optional since PHP 5.
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See also fgets(), fopen(), fsockopen(), popen(), and strip_tags().