如何编写高效处理字符串的长尾函数？

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pythondef make_semiangle($str): $arr=array( '＜'=> '0', '＞'=> '1', '＜'=> '2', '＞'=> '3', '＜'=> '4', '＞'=> '5', '＜'=> '6', '＞'=> '7', '＜'=> '8', '＞'=> '9', '＜'=> 'A', '＞'=> 'B', '＜'=> 'C' ); return strtr($str, $arr);

有用的函数-字符串处理

1. function make_semiangle($str)
2. {
3. $arr = array('０' => '0', '１' => '1', '２' => '2', '３' => '3', '４' => '4',
4. '５' => '5', '６' => '6', '７' => '7', '８' => '8', '９' => '9',
5. 'Ａ' => 'A', 'Ｂ' => 'B', 'Ｃ' => 'C', 'Ｄ' => 'D', 'Ｅ' => 'E',
6. 'Ｆ' => 'F', 'Ｇ' => 'G', 'Ｈ' => 'H', 'Ｉ' => 'I', 'Ｊ' => 'J',
7. 'Ｋ' => 'K', 'Ｌ' => 'L', 'Ｍ' => 'M', 'Ｎ' => 'N', 'Ｏ' => 'O',
8. 'Ｐ' => 'P', 'Ｑ' => 'Q', 'Ｒ' => 'R', 'Ｓ' => 'S', 'Ｔ' => 'T',
9. 'Ｕ' => 'U', 'Ｖ' => 'V', 'Ｗ' => 'W', 'Ｘ' => 'X', 'Ｙ' => 'Y',
10. 'Ｚ' => 'Z', 'ａ' => 'a', 'ｂ' => 'b', 'ｃ' => 'c', 'ｄ' => 'd',
11. 'ｅ' => 'e', 'ｆ' => 'f', 'ｇ' => 'g', 'ｈ' => 'h', 'ｉ' => 'i',
12. 'ｊ' => 'j', 'ｋ' => 'k', 'ｌ' => 'l', 'ｍ' => 'm', 'ｎ' => 'n',
13. 'ｏ' => 'o', 'ｐ' => 'p', 'ｑ' => 'q', 'ｒ' => 'r', 'ｓ' => 's',
14. 'ｔ' => 't', 'ｕ' => 'u', 'ｖ' => 'v', 'ｗ' => 'w', 'ｘ' => 'x',
15. 'ｙ' => 'y', 'ｚ' => 'z',
16. '（' => '(', '）' => ')', '〔' => '[', '〕' => ']', '' => ']', '〖' => '[', '〗' => ']', '“' => '[', '”' => ']',
17. '‘' => '[', '’' => ']', '｛' => '{', '｝' => '}', '《' => '<',
18. '》' => '>',
19. '％' => '%', '＋' => '+', '—' => '-', '－' => '-', '～' => '-',
20. '：' => ':', '。' => '.', '、' => ',', '，' => '.', '、' => '.',
21. '；' => ',', '？' => '?', '！' => '!', '…' => '-', '‖' => '|',
22. '”' => '"', '’' => '`', '‘' => '`', '｜' => '|', '〃' => '"',
23. '　' => ' ','＄'=>'$','＠'=>'@','＃'=>'#','＾'=>'^','＆'=>'&','＊'=>'*',
24. '＂'=>'"');
26. return strtr($str, $arr);
27. }

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2.字符串转译

1.字符串处理

1. function Char_rev($msg,$direct=0){
2. $or_str =array('&',' ','&quot;','&#39;','&lt;','&gt;'," &nbsp;&nbsp;",""," &nbsp; ","<br>","<br />");
3. $rep_str = array('&amp;','&nbsp;','"',"'","<",">","\t","\r"," ","\n","\n");
4. if(0==$direct)
5. {$msg=str_replace($or_str,$rep_str,$msg);}
6. else
7. {$msg = str_replace($rep_str,$or_str,$msg);}
8. return $msg;
9. }

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3.计算字符串长度(汉字按两字符算)

1. function str_len($str)
2. {
3. $length = strlen(preg_replace('/[\x00-\x7F]/', '', $str));
4. if ($length)
5. {
6. return strlen($str) - $length + intval($length / 3) * 2;
7. }
8. else
9. {
10. return strlen($str);
11. }
12. }

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4.phpcms加解密函数

1. function phpcms_encode($txt, $key)
2. {
3. srand((double)microtime() * 1000000);
4. $encrypt_key = md5(rand(0, 32000));
5. $ctr = 0;
6. $tmp = '';
7. for($i = 0;$i < strlen($txt); $i++)
8. {
9. $ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr;
10. $tmp .= $encrypt_key[$ctr].($txt[$i] ^ $encrypt_key[$ctr++]);
11. }
12. return base64_encode(phpcms_key($tmp, $key));
13. }
14. function phpcms_decode($txt, $key)
15. {
16. $txt = phpcms_key(base64_decode($txt), $key);
17. $tmp = '';
18. for ($i = 0;$i < strlen($txt); $i++)
19. {
20. $md5 = $txt[$i];
21. $tmp .= $txt[++$i] ^ $md5;
22. }
23. return $tmp;
24. }
25. function phpcms_key($txt, $encrypt_key)
26. {
27. $encrypt_key = md5($encrypt_key);
28. $ctr = 0;
29. $tmp = '';
30. for($i = 0; $i < strlen($txt); $i++)
31. {
32. $ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr;
33. $tmp .= $txt[$i] ^ $encrypt_key[$ctr++];
34. }
35. return $tmp;
36. }

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5.正则加亮关键字

2. function highlight_words($str, $words, $color = '#FFFF00') {
3. if(is_array($words)) {
4. foreach($words as $k => $word) {
5. $pattern[$k] = "/\b($word)\b/is";
6. $replace[$k] = '<font style="background-color:'.$color.';">\\1</font>';
7. }
8. }
9. else {
10. $pattern = "/\b($words)\b/is";
11. $replace = '<font style="background-color:'.$color.';">\\1</font>';
12. }
14. return preg_replace($pattern,$replace,$str);
15. }

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6.view中selected 和checked的懒人处理方法

1. /*
2. <select><option value='a' [code]=select($a,'a')

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></option></select>

*/

function select($a,$b){

if($a==$b){

return "selected";

}else{

return "";

}

}

function radio($a,$b){

if($a==$b){

return "checked";

}else{

return "";

}

}

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