php ASCII 字符转换 (汉字及特殊字符) 宽字符 (uft8/unicode)
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有点像现在流行的输入法中的特殊字符。
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1. 英文字母或者数字转ASCII 效果如上
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class:
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<?class ascii{ var $asciiText; function ascii($text,$style) { switch($style) { case 'graffiti': include "graffiti.font"; break; case 'banner': include 'banner.font'; break; default: include 'dos.font'; break; } $text=strtolower($text); for($c=0;$c<strlen($text);$c++) $symbol[$c]=explode("\n",$arr[$text[$c]]); for($c=0;$c<sizeof($symbol[0]);$c++): for($k=0;$k<strlen($text);$k++) $output.=" ".str_replace("\r","",$symbol[$k][$c]); $output.="\n"; endfor; $this->asciiText=$output; }}?
实例:
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<PRE><?include_once("ascii.class.php"); // includes the class's file$text=new ascii("justcoding","doc"); // first parameter is text that will be converted, second is the font styleprint $text->asciiText; // asciiText is variable of converted text?></PRE>?
可以通过css控制字符大小。具体见附件。
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2. 汉字转ASCII 效果为 “星期天 ” 就是 “星期天”
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function encode($c){ $len = strlen($c); $a = 0; while ($a < $len) { $ud = 0; if (ord($c{$a}) >=0 && ord($c{$a})<=127) { $ud = ord($c{$a}); $a += 1; } else if (ord($c{$a}) >=192 && ord($c{$a})<=223) { $ud = (ord($c{$a})-192)*64 + (ord($c{$a+1})-128); $a += 2; } else if (ord($c{$a}) >=224 && ord($c{$a})<=239) { $ud = (ord($c{$a})-224)*4096 + (ord($c{$a+1})-128)*64 + (ord($c{$a+2})-128); $a += 3; } else if (ord($c{$a}) >=240 && ord($c{$a})<=247) { $ud = (ord($c{$a})-240)*262144 + (ord($c{$a+1})-128)*4096 + (ord($c{$a+2})-128)*64 + (ord($c{$a+3})-128); $a += 4; } else if (ord($c{$a}) >=248 && ord($c{$a})<=251) { $ud = (ord($c{$a})-248)*16777216 + (ord($c{$a+1})-128)*262144 + (ord($c{$a+2})-128)*4096 + (ord($c{$a+3})-128)*64 + (ord($c{$a+4})-128); $a += 5; } else if (ord($c{$a}) >=252 && ord($c{$a})<=253) { $ud = (ord($c{$a})-252)*1073741824 + (ord($c{$a+1})-128)*16777216 + (ord($c{$a+2})-128)*262144 + (ord($c{$a+3})-128)*4096 + (ord($c{$a+4})-128)*64 + (ord($c{$a+5})-128); $a += 6; } else if (ord($c{$a}) >=254 && ord($c{$a})<=255) { //error $ud = false; } $scill .= "&#$ud;"; } return $scill;}echo encode('日'); // 日 浏览器默认会解读,所以要看源代码
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3. utf-8 unicode 互转
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<?// utf8 - unicodefunction utf8_unicode($c) { switch(strlen($c)) { case 1: return ord($c); case 2: $n = (ord($c[0]) & 0x3f) << 6; $n += ord($c[1]) & 0x3f; return $n; case 3: $n = (ord($c[0]) & 0x1f) << 12; $n += (ord($c[1]) & 0x3f) << 6; $n += ord($c[2]) & 0x3f; return $n; case 4: $n = (ord($c[0]) & 0x0f) << 18; $n += (ord($c[1]) & 0x3f) << 12; $n += (ord($c[2]) & 0x3f) << 6; $n += ord($c[3]) & 0x3f; return $n; }}echo utf8_unicode('以');?>?
<?// unicode - utf8function u2utf8($c) { $str=""; if ($c < 0x80) $str.=$c; else if ($c < 0x800) { $str.=chr(0xC0 | $c>>6); $str.=chr(0x80 | $c & 0x3F); } else if ($c < 0x10000) { $str.=chr(0xE0 | $c>>12); $str.=chr(0x80 | $c>>6 & 0x3F); $str.=chr(0x80 | $c & 0x3F); } else if ($c < 0x200000) { $str.=chr(0xF0 | $c>>18); $str.=chr(0x80 | $c>>12 & 0x3F); $str.=chr(0x80 | $c>>6 & 0x3F); $str.=chr(0x80 | $c & 0x3F); }return $str; }echo u2utf8('20197');?>?
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