Question

我有一些功能（部分）：

foreach ($keyword as $key) {                                                                                                            
    $keyword = substr($key, 0, 3);                                                                                                      
    $para = preg_replace("/\b([a-z]*${keyword}[a-z]*)\b/i","<span style='color:#20a8d8'>$1</span>",$para);
}

现在我可以突出我的foreach循环的结果，当然只有前3个字符，我怎样才能突出显示3个第一个字符有效的整个单词？

我也试过了：

foreach ($paras as $para) {
    $keyword = explode(" ", $keyword);

    foreach ($keyword as $key) {
        $keywordcheck = substr($key, 0, 3);
        $paracheck = preg_replace("/\b([a-z]*${keywordcheck}[a-z]*)\b/i","<span style='color:#20a8d8'>$1</span>",$para);
        if (isset($paracheck)) {
            $para = preg_replace("/\b([a-z]*${keyword}[a-z]*)\b/i","<span style='color:#20a8d8'>$1</span>",$para);
        }
    }
}

新代码：

foreach ($paras as $para) {                 
    $keyword = explode(" ", $keyword);

    foreach ($keyword as $key) {
        $key = substr($key, 0, 3);
        $para = preg_replace("/\b({$key}[a-z]*)\b/i","<span style='color:#20a8d8'>$1</span>", $para);
    }   

    echo '<tr><td style="width:15%"></td>';                 
    echo '<td>';
    echo 'META TITLE: '.$para.'';
    echo '</td></tr>';
}

Answer 1

试试这个

$para = "Microsoft is company placed in USA";
$keyword = ['com'];

foreach ($keyword as $key) {
    $kw = substr($key, 0, 3);
    $para = preg_replace("/\b({$kw}[-a-z]*)\b/i","<span style='color:#20a8d8'>$1</span>", $para);
}

echo $para;

http://ideone.com/rGb5q8

Answer 2

你可以爆炸字符串并使用Substr来检查foreach中每个单词的前三个我使用str_replace将单词替换为span标记中包含的单词。

<Window x:Class="WPFCustomeControlLibrary.Window"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        mc:Ignorable="d"
        Title="Window" Height="300" Width="300">
    <Window.Resources>
        <ResourceDictionary Source="Dictionary.xaml" />
    </Window.Resources>
    <Grid DataContext="{Binding MainViewModel, Mode=OneWay, Source={StaticResource Locator}}">

    </Grid>
</Window>

https://3v4l.org/WkK5j

在我看来，没有理由使用正则表达式，因为它不是真正的模式。这只是前三个角色。

修改以确保它不会突出显示人物中的$str = "a life with fitness is boring but it may fit some people. Apples new iFit is not highlighted"; $arr = explode(" ", $str); Foreach($arr as &$word){ If(Substr($word,0,3) == "peo"){ // If word has a . Or any other special character after the word handle it. If(ctype_alpha(Substr($word,-1))){ $word = str_replace($word, "<span style='color:#20a8d8'>".$word."</span>", $word); }Else{ $char = substr($word,-1); //if it has a dot this "saves" it // Here I remove the dot, and insert it last (after span) $word = str_replace($word, "<span style='color:#20a8d8'>".substr($word,0,-1)."</span>", $word) . $char; } } } Echo implode(" ", $arr);。

如果前3个字符有效，则高亮全字

2 个答案: