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PHP Filter º¯Êý

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filter_has_var() ¼ì²éÊÇ·ñ´æÔÚÖ¸¶¨ÊäÈëÀàÐ͵ıäÁ¿¡£ 5
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PHP Filters

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FILTER_CALLBACK µ÷ÓÃÓû§×Ô¶¨Ò庯ÊýÀ´¹ýÂËÊý¾Ý¡£
FILTER_SANITIZE_STRING È¥³ý±êÇ©£¬È¥³ý»ò±àÂëÌØÊâ×Ö·û¡£
FILTER_SANITIZE_STRIPPED "string" ¹ýÂËÆ÷µÄ±ðÃû¡£
FILTER_SANITIZE_ENCODED URL-encode ×Ö·û´®£¬È¥³ý»ò±àÂëÌØÊâ×Ö·û¡£
FILTER_SANITIZE_SPECIAL_CHARS HTML תÒå×Ö·û '"<>& ÒÔ¼° ASCII ֵСÓÚ 32 µÄ×Ö·û¡£
FILTER_SANITIZE_EMAIL ɾ³ýËùÓÐ×Ö·û£¬³ýÁË×Öĸ¡¢Êý×ÖÒÔ¼° !#$%&'*+-/=?^_`{|}~@.[]
FILTER_SANITIZE_URL ɾ³ýËùÓÐ×Ö·û£¬³ýÁË×Öĸ¡¢Êý×ÖÒÔ¼° $-_.+!*'(),{}|\\^~[]`<>#%";/?:@&=
FILTER_SANITIZE_NUMBER_INT ɾ³ýËùÓÐ×Ö·û£¬³ýÁËÊý×ÖºÍ +-
FILTER_SANITIZE_NUMBER_FLOAT ɾ³ýËùÓÐ×Ö·û£¬³ýÁËÊý×Ö¡¢+- ÒÔ¼° .,eE¡£
FILTER_SANITIZE_MAGIC_QUOTES Ó¦ÓÃ addslashes()¡£
FILTER_UNSAFE_RAW ²»½øÐÐÈκιýÂË£¬È¥³ý»ò±àÂëÌØÊâ×Ö·û¡£
FILTER_VALIDATE_INT ÔÚÖ¸¶¨µÄ·¶Î§ÒÔÕûÊýÑéÖ¤Öµ¡£
FILTER_VALIDATE_BOOLEAN Èç¹ûÊÇ "1", "true", "on" ÒÔ¼° "yes"£¬Ôò·µ»Ø true£¬Èç¹ûÊÇ "0", "false", "off", "no" ÒÔ¼° ""£¬Ôò·µ»Ø false¡£·ñÔò·µ»Ø NULL¡£
FILTER_VALIDATE_FLOAT ÒÔ¸¡µãÊýÑéÖ¤Öµ¡£
FILTER_VALIDATE_REGEXP ¸ù¾Ý regexp£¬¼æÈÝ Perl µÄÕýÔò±í´ïʽÀ´ÑéÖ¤Öµ¡£
FILTER_VALIDATE_URL °ÑÖµ×÷Ϊ URL À´ÑéÖ¤¡£
FILTER_VALIDATE_EMAIL °ÑÖµ×÷Ϊ e-mail À´ÑéÖ¤¡£
FILTER_VALIDATE_IP °ÑÖµ×÷Ϊ IP µØÖ·À´ÑéÖ¤¡£
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