將字串分成兩部分解決思路

將字串分成兩部分
將一個字串，按照開頭的www 和A：將字串分成兩個字串
$str = "www.asdfsfd.com,A:xiaohua,www.baidu.com,A:huanghuang,www.360buy.com,www.huahua.com,www.huanghuang.com,A:asdds,www.dd.com";將這個字串分成兩個字串 輸出為$a="www.asdfsfd.com,www.baidu.com,www.360buy.com,www.huahua.com,www.huanghuang.com,www.dd.com";
$b ="A:xiaohua,A:huanghuang,A:asdds"; php，字串處理

------解決方案--------------------
preg_match_all("/www\.[a-z]*\.[a-z]*/is", $str, $out);
preg_match_all("/A:[a-z]*/is", $str, $out2);
------解決方案--------------------
$str_arr = explode(',',$str);
foreach($str_arr as $key=>$val){
if(substr($val,0,3) == 'www'){
$a_str .= $val.',';
}else{
$b_str .= $val.',';
}
}
$a = substr($a_str,0,-1);
$b = substr($b_str,0,-1);
------解決方案--------------------

$str = "www.asdfsfd.com,A:xiaohua,www.baidu.com,A:huanghuang,www.360buy.com,www.huahua.com,www.huanghuang.com,A:asdds,www.dd.com";
preg_match_all("/(?:(www\..*?),
------解決方案--------------------
(A\:.*?)(?=,
------解決方案--------------------
$))/",$str,$match);
$str1 = preg_replace("/,{2,}/",",",implode(",",$match[1]));
echo preg_replace("/^,/","",$str1); 
echo "
";
$str2 =preg_replace("/(,{2,})/",",",implode(",",$match[2])); 
echo preg_replace("/^,/","",$str2);

------解決方案--------------------

$str = "www.asdfsfd.com,A:xiaohua,www.baidu.com,A:huanghuang,www.360buy.com,www.huahua.com,www.huanghuang.com,A:asdds,www.dd.com";
preg_match_all('/(www[\w.]+),?(A:\w+)?/',$str,$m);
echo join(',',$m[1]);
echo '
';
echo join(',',array_diff($m[2],array('')));

------解決方案--------------------

$str = "www.asdfsfd.com,A:xiaohua,www.baidu.com,A:huanghuang,www.360buy.com,www.huahua.com,www.huanghuang.com,A:asdds,www.dd.com";

preg_match_all('/(www[^,]+)
------解決方案--------------------
(A:[^,]+)/', $str, $res);
$a = join(',', array_diff($res[1], array('')));
$b = join(',', array_diff($res[2], array('')));

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