PHP从内容里面随机抽取标题

<?php

$temp=$LabelArray['内容'];

$temp=preg_replace("%<[^>]+>%",',',$temp);//防止网址中字母被匹配

$temp=make_semiangle($temp);//半角转化

if(preg_match_all("%[[:punct:]]([^[:punct:]]{5,30})[[:punct:]]%u",$temp,$arr)){

$i=rand(0,count($arr[0])-1);

$LabelArray['标题']=$arr[1][$i];

}

// 全角半角转

function make_semiangle($str) 

{ 

    $arr = array('０' => '0', '１' => '1', '２' => '2', '３' => '3', '４' => '4', 

                 '５' => '5', '６' => '6', '７' => '7', '８' => '8', '９' => '9', 

                 'Ａ' => 'A', 'Ｂ' => 'B', 'Ｃ' => 'C', 'Ｄ' => 'D', 'Ｅ' => 'E', 

                 'Ｆ' => 'F', 'Ｇ' => 'G', 'Ｈ' => 'H', 'Ｉ' => 'I', 'Ｊ' => 'J', 

                 'Ｋ' => 'K', 'Ｌ' => 'L', 'Ｍ' => 'M', 'Ｎ' => 'N', 'Ｏ' => 'O', 

                 'Ｐ' => 'P', 'Ｑ' => 'Q', 'Ｒ' => 'R', 'Ｓ' => 'S', 'Ｔ' => 'T', 

                 'Ｕ' => 'U', 'Ｖ' => 'V', 'Ｗ' => 'W', 'Ｘ' => 'X', 'Ｙ' => 'Y', 

                 'Ｚ' => 'Z', 'ａ' => 'a', 'ｂ' => 'b', 'ｃ' => 'c', 'ｄ' => 'd', 

                 'ｅ' => 'e', 'ｆ' => 'f', 'ｇ' => 'g', 'ｈ' => 'h', 'ｉ' => 'i', 

                 'ｊ' => 'j', 'ｋ' => 'k', 'ｌ' => 'l', 'ｍ' => 'm', 'ｎ' => 'n', 

                 'ｏ' => 'o', 'ｐ' => 'p', 'ｑ' => 'q', 'ｒ' => 'r', 'ｓ' => 's', 

                 'ｔ' => 't', 'ｕ' => 'u', 'ｖ' => 'v', 'ｗ' => 'w', 'ｘ' => 'x', 

                 'ｙ' => 'y', 'ｚ' => 'z', 

                 '（' => '(', '）' => ')', '〔' => '[', '〕' => ']', '【' => '[', 

                 '】' => ']', '〖' => '[', '〗' => ']', '“' => '[', '”' => ']', 

                 '‘' => '[', '’' => ']', '｛' => '{', '｝' => '}', '《' => '<', 

                 '》' => '>', 

                 '％' => '%', '＋' => '+', '—' => '-', '－' => '-', '～' => '-', 

                 '：' => ':', '。' => '.', '、' => ',', '，' => '.', '、' => '.', 

                 '；' => ',', '？' => '?', '！' => '!', '…' => '-', '‖' => '|', 

                 '”' => '"', '’' => '`', '‘' => '`', '｜' => '|', '〃' => '"', 

                 '　' => ' ','＄'=>'$','＠'=>'@','＃'=>'#','＾'=>'^','＆'=>'&','＊'=>'*',

                 '＂'=>'"');

     return strtr($str, $arr); 

}

echo serialize($LabelArray);

?>