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"\t" (ASCII 9 (0x09)), a tab. 
"\n" (ASCII 10 (0x0A)), a new line (line feed). 
"\r" (ASCII 13 (0x0D)), a carriage return. 
"\0" (ASCII 0 (0x00)), the NUL-byte. 
"\x0B" (ASCII 11 (0x0B)), a vertical tab. 
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<?php
$str = " ʹÓú¯ÊýtrimÈ¥µô×Ö·û´®Á½¶Ë¿Õ°××Ö·û ";
$str1 = trim($str);
echo "´¦ÀíǰÓÐ".strlen($str)."¸ö×Ö·û";
echo "<br/>"; //www.phpjc.cn
echo "<br/>";
echo "ʹÓÃtrimº¯Êý´¦ÀíºóÓÐ".strlen($str1)."¸ö×Ö·û";
?>
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<?php
$str = "##ʹÓú¯ÊýtrimÈ¥µô×Ö·û´®Á½¶ËÌØ¶¨×Ö·û####";
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echo $str."<br>";
echo $str1;
?>
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PHP×Ö·û´®½Ì³Ì_trimº¯Êý

PHP trim() º¯Êý
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trim(str,charlist)
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