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// ÎÒ¿´¹ýµÄÁ½±¾Êé PHP µÄÊéÖÐÌá¼°µ½ PHP6 µÄÐÂÌØÐÔ£¬ÆäÖÐÁ½¸öÊÇ namespace ºÍ unicode£¬
// ´Ó PHP5.3 ¿ªÊ¼£¬php ÒѾ­Ö§³Ö namespace ÁË; ¶ø Unicode ÔÚ PHP5.3 Öл¹Ã»Óз¢²¼¡£
//
// ¿´Êé¿´µ½ PHP µÄ¶à×Ö½Ú´¦Àí£¬Ï뵽ǰ¶Îʱ¼ä»¹»á×Ô¼º½ØÈ¡ ÖÐÓ¢»ìºÏµÄ×Ö·û´®£¬ÄÇʱºò»¨Á˺ܳ¤Ê±¼äÀ´¿´ utf£­8£¬
// gbk, gb2312, gb18030, unicode Ö®ÀàµÄ£¬ÏÖÔÚ¿´ÓÐÁ˶à×Ö½Ú´¦ÀíµÄÀ©Õ¹²»ÐèÒªÄÇôÂé·³ÁË¡£
//
// php5 ÔÚÁ½¸öÀ©Õ¹ÖÐÖ§³Ö×Ö·û±àÂëºÍ¶à×Ö½ÚÎÊÌ⣺
// iconv ºÍ mbstring
// Á½¸öÖ®¼äµÄÖ÷񻂿±ð£º
// iconv ʹÓõÄÒ»¸öÍⲿµÄ¿â£»¶ø mbstring ʹÓõÄÊÇ php °ï¶¨µÄ¿â¡£
// ÒòΪ iconv (Ö»ÉÙÔÚ×îÐ嵀 linux °æ±¾ÖÐ)Ö§³Ö¸ü¶àµÄ±àÂ룬ËùÒÔ iconv ¿ÉÄÜÊÇͨÓû°×îºÃµÄÑ¡Ôñ¡£
/**
* iconv º¯Êý
*/
iconv_get_encoding()
// 0/1
// Retrieve internal configuration variables of iconv extension
iconv_mime_decode_headers()
// 1/3
// Decodes multiple MIME header fields at once
// ·µ»ØÊý×é
// Returns an associative array that holds a whole set of MIME header fields specified
// by encoded_headers on success, or FALSE if an error occurs during the decoding.
iconv_mime_decode()
// 1/3
// Decodes a MIME header field
// Returns a decoded MIME field on success, or FALSE if an error occurs during the decoding.
iconv_mime_encode()
// 2/3
// Composes a MIME header field
// Returns an encoded MIME field on success, or FALSE if an error occurs during the encoding.
iconv_set_encoding()
// 2/2
// Set current setting for character encoding conversion
// Returns TRUE on success or FALSE on failure.
// iconv_set_encoding() ¿ÉÒÔÓÃÀ´ÉèÖÃÄÚ²¿±àÂëºÍÊä³ö±àÂ룻
// ÄÚ²¿±àÂëÉèÖÿÉÒÔÓ°ÏìһϵÁд¦Àí×Ö·û´®µÄº¯Êý¡£Êä³ö±àÂëÑ¡ÏîË¿ºÁ²»»áÓ°ÏìÄÇЩ¹¦ÄÜ£¬
// µ«ÊÇ¿ÉÒÔÓÃÀ´ÓÚ ob_iconv_handler Êä³ö»º³å´¦ÀíÆ÷×éºÏʹÓÃ.
// Èç¹û¿ªÆô£¬php ½«×Ô¶¯°ÑÊä³öµ½ä¯ÀÀÆ÷µÄÎı¾´ÓÄÚ²¿±àÂëת»»ÎªÊä³ö±àÂë¡£
// --
ob_start( 'ob_iconv_handler');
iconv_set_encoding( 'internal_encoding', 'UTF-8');
iconv_set_encoding( 'output_encoding', 'ISO-8859-1');
print_r( iconv_get_encoding() );
$text = <<<TEXT
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