我正在使用它:
$t = "#hashtag #goodhash_tag united states #l33t this";
$queryVariable = "";
if(preg_match_all('/(^|\s)(#\w+)/', $t, $arrHashTags) > 0){
array_filter($arrHashTags);
array_unique($arrHashTags);
$count = count($arrHashTags[2]);
if($count > 1){
$counter = 1;
foreach ($arrHashTags[2] as $strHashTag) {
if (preg_match('/#\d*[a-z_]+/i', $strHashTag)) {
if($counter == $count){
$queryVariable .= $strHashTag;
} else{
$queryVariable .= $strHashTag." and ";
}
$newTest = str_replace($arrHashTags[2],"", $t);
}
$counter = $counter + 1;
}
}
}
echo $queryVariable."<br>"; // this is list of tags
echo $newTest; // this is the remaining text
基于$t
的输出是:
#hashtag and #goodhash_tag and #l33t
united states this
第一个问题:
如果$t = '#hashtag#goodhash_tag united states #l33t this';
,即两个标签之间没有空格,则输出变为:
#hashtag and #l33t
#goodhash_tag united states this
第二个问题:
如果$t = '#hashtag #goodhash_tag united states #l33t this #123';
,即带有无效标记#123
,它会以某种方式扰乱我在$queryVariable
中提取的标记列表,就像输出变为
#hashtag and #goodhash_tag and #l33t and // note the extra 'and'
united states this
如果有人请帮助这两个人吗?
答案 0 :(得分:5)
而不是为你的正则表达式使用这么多的比较等。您可以简单地拥有以下内容:
$t = "#hashtag #goodhash_tag united states #l33t this #123#tte#anothertag sth";
$queryVariable = "";
preg_match_all('/(#[A-z_]\w+)/', $t, $arrHashTags);
print_r( $arrHashTags[1] );
要将and
加入它们作为字符串,您可以使用implode。
$queryVariable = implode( $arrHashTags[1], " and " );
对于剩余的文字,您可以preg_replace
或str_replace
(无论您选择哪种方式)。
这是codepad link。