PHP实现获取中英文按照首字母
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/**
*
*/
function getfirstchar( $s0 ){
if ( $s0 [0]== 'I' || $s [0]== 'i' ){
return "I" ;
} elseif ( $s0 [0]== 'U' || $s [0]== 'u' ){
return 'U' ;
} elseif ( $s0 [0]== 'V' || $s [0]== 'v' ){
return 'V' ;
} else {
$fchar = ord( $s0 {0});
if ( $fchar >= ord( "A" ) and $fchar <= ord( "z" ) ) return strtoupper ( $s0 {0});
$s1 = iconv( "UTF-8" , "gb2312" , $s0 );
$s2 = iconv( "gb2312" , "UTF-8" , $s1 );
if ( $s2 == $s0 ){ $s = $s1 ;} else { $s = $s0 ;}
$asc = ord( $s {0}) * 256 + ord( $s {1}) - 65536;
if ( $asc >= -20319 and $asc <= -20284) return "A" ;
if ( $asc >= -20283 and $asc <= -19776) return "B" ;
if ( $asc >= -19775 and $asc <= -19219) return "C" ;
if ( $asc >= -19218 and $asc <= -18711) return "D" ;
if ( $asc >= -18710 and $asc <= -18527) return "E" ;
if ( $asc >= -18526 and $asc <= -18240) return "F" ;
if ( $asc >= -18239 and $asc <= -17923) return "G" ;
if ( $asc >= -17922 and $asc <= -17418) return "H" ;
if ( $asc >= -17417 and $asc <= -16475) return "J" ;
if ( $asc >= -16474 and $asc <= -16213) return "K" ;
if ( $asc >= -16212 and $asc <= -15641) return "L" ;
if ( $asc >= -15640 and $asc <= -15166) return "M" ;
if ( $asc >= -15165 and $asc <= -14923) return "N" ;
if ( $asc >= -14922 and $asc <= -14915) return "O" ;
if ( $asc >= -14914 and $asc <= -14631) return "P" ;
if ( $asc >= -14630 and $asc <= -14150) return "Q" ;
if ( $asc >= -14149 and $asc <= -14091) return "R" ;
if ( $asc >= -14090 and $asc <= -13319) return "S" ;
if ( $asc >= -13318 and $asc <= -12839) return "T" ;
if ( $asc >= -12838 and $asc <= -12557) return "W" ;
if ( $asc >= -12556 and $asc <= -11848) return "X" ;
if ( $asc >= -11847 and $asc <= -11056) return "Y" ;
if ( $asc >= -11055 and $asc <= -10247) return "Z" ;
return null;
}
}
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以上所述就是本文的全部内容了,希望大家能够喜欢。