Question

我正试图为我面临的问题找到解决方案。我有以下段落

Lorem ipsum dolor坐下，！qwerty 奉献自若。 Quisque sapien velit，aliquet eget commodo nec，auctor a sapien。 ！qwerty Nam eu neque vulputate diam rhoncus ！ bart faucibus。 Curabitur quis varius libero。洛雷姆。

我必须消除以！开头的重复值。例如：在段落中有两个！qwerty字符串，我想通知插入该段落的用户将重复值限制为一个而不会影响第三个！bart标记，我该如何在php中做到这一点。到目前为止，我尝试了strcmp，preg_match和str_pos，但都没有用，这让我头疼。

到目前为止我尝试过的代码（如果有不必要的代码，因为我还在学习，很抱歉）：

$data="Lorem ipsum dolor sit amet, !qwerty consectetur adipiscing elit. Quisque sapien velit, aliquet eget commodo nec, auctor a sapien. !qwerty Nam eu neque vulputate diam rhoncus !bart faucibus. Curabitur quis varius libero. Lorem.";
$dat=  explode(" ", $data);//names are exploded in to array 

foreach($dat as $d) {

    $compare1=in_array($d,$dat);

    if(strpos($d ,'!') !== FALSE ){

        $i=0;
        $d2=count($dat);
        while ($i<$d2) {

            $d_w=$dat[$i];
            //print_r($d_w);
            $regex="/!+([a-zA-z0-9._-]+)/";
            $d1= preg_match($regex, $d);
            $i++;
            $d21=$d;
            $d3= count($d2);
            $d4= parse_str($d2,$out);

            $d5===strcmp($d, $d_w);
            $d6=== strpos($d_w, $d);

            var_dump("<p>".$d5."</p><i>".$d6); 
            if ($d21===$d_w ) {
                $tag=1; 
                $d7=$tag+tag;
                print_r("<span>".$tag."</span>");echo '<br>';print_r("<p>".$d7);
                if($d7>1){
                    echo 'only one tag is allowed per post';  
                }
            }
        }
        //var_dump($compare1);
        exit();
    }

Answer 1

尝试以下解决方案：

$data1="Lorem ipsum dolor sit amet, !qwerty consectetur adipiscing elit. Quisque sapien velit, aliquet eget commodo nec, auctor a sapien. !qwerty Nam eu neque vulputate diam rhoncus !bart faucibus. Curabitur quis varius libero. Lorem.";

function findIfDataHaveRepeatPattern ($data) {

    // First, use regex to grab all pattern at once.
    if (preg_match_all('/!\w+/u', $data, $matches)) {
        foreach ($matches[0] as $crrTargetStr) {
            $targetStrCollection[] = $crrTargetStr;
        }
    }
    sort($targetStrCollection);
    // Second, sort() the array element. After sorting will makes finding duplication
    // much more easier because now we only need to check/compare
    // if every nearby element are the same or not.
    $countOfCollection = count($targetStrCollection);
    if ($countOfCollection > 1) {
        for ($i = 0 ; $i < count($targetStrCollection) ; $i++) {
            if ($i === $countOfCollection - 1) {
                return FALSE;
            }
            if ($targetStrCollection[$i] === $targetStrCollection[$i + 1]) {
                // If nearby element are the same, it means this SORTED array has duplicated pattern.
                return $targetStrCollection[$i];
            }
        }
    } else {
        return FALSE;
    }
}


function printIfDataHaveRepeatPattern ($data) {
    $testResult = findIfDataHaveRepeatPattern($data);
    // If return value is FALSE, then nothing duplicated
    // , if return value is a string, then it is the duplicated string.

    if ($testResult) {
        echo("Duplicate on pattern " . $testResult . " in your input.");
    } else {
        echo("No duplicate pattern in your input.");
    }
}

printIfDataHaveRepeatPattern($data1);
// Will show "Duplicate on pattern !qwerty in your input.".

这可以解决您的问题吗？询问更多是否需要更多帮助。

如何从php中的段落比较两个字符串

1 个答案: