用PHP在变量中加粗特定文本？

我正在尝试修改项目中的字符串。我正在修改的字符串包含用户输入的段落，我试图用用户输入的名词和动词替换特定出现的单词（如名词/动词）。一切都很好，除了我试图让用户输入的名词和动词的字体变为粗体，但是我不知道在哪里加粗文本。如有任何建议或建议，将不胜感激

<?php

//Variables
$stringFirstVerb = $_POST["stringFirstVerb"];             
$stringSecondVerb = $_POST["stringSecondVerb"];           
$stringThirdVerb = $_POST["stringThirdVerb"];             
$stringFirstNoun = $_POST["stringFirstNoun"];        
$stringSecondNoun = $_POST["stringSecondNoun"];             
$stringThirdNoun = $_POST["stringThirdNoun"];            
$stringFirstAdj = $_POST["stringFirstAdj"];     
$stringSecondAdj = $_POST["stringSecondAdj"];           
$stringThirdAdj = $_POST["stringThirdAdj"];             
$stringParagraph = $_POST["stringParagraph"];        
$intNounCount = 0;
$intVerbCount= 0;
$intAdjCount = 0;

//check for user input
$stringNewStr = implode("",array($stringFirstVerb,$stringSecondVerb,$stringThirdVerb,$stringFirstNoun,$stringSecondNoun,$stringThirdNoun,$stringFirstAdj,$stringSecondAdj,$stringThirdAdj));   //consolidates every replacable word into a single string

if( strpos($stringNewStr, ' ' ) !== false ){
echo "No spaces allowed in any Verbs, Nouns, or Adj's";
echo "<br>";
echo "<a href='project1.html'>Link to previous Page</a>";
}


else if( strpos($stringNewStr, '!' ) !== false  || strpos($stringNewStr, '.' ) !== false ||
strpos($stringNewStr, ';' ) !== false || 
strpos($stringNewStr, ':' ) !== false ||
strpos($stringNewStr, ',' ) !== false){
echo "No punctuation allowed in any Verbs, Nouns, or Adj's";
echo "<br>";
echo "<a href='project1.html'>Link to previous Page</a>";
}




else                    //if input is valid, moves onto next step

//checkif paragraph contains 3 of each word types
{

$stringNoun = "NOUN";
$intNounCount = (substr_count($stringParagraph, $stringNoun));

$stringVerb = "VERB";
$intVerbCount = (substr_count($stringParagraph, $stringVerb));

$stringAdj = "ADJ";
$intAdjCount = (substr_count($stringParagraph, $stringAdj));

echo $intNounCount;
echo $intAdjCount;
echo $intVerbCount;

if ($intNounCount !== 3 || $intVerbCount !== 3 || $intAdjCount !== 3){
echo "the paragraph must contain the words VERB, NOUN, and ADJ three times each!";
echo "<br>";
echo "<a href='project1.html'>Link to 
previous Page</a>";
}

else    //if conditions are met
{

//replace user entered words
$stringParagraph = str_replace('VERB1', 
$stringFirstVerb, $stringParagraph);    
//replaces the first verb in the paragraph with user entered verb in bold text
$stringParagraph = str_replace('VERB2', 
$stringSecondVerb, $stringParagraph);     
//replaces the second verb in the paragraph with user entered verb in bold text
$stringParagraph = str_replace('VERB3', 
$stringThirdVerb, $stringParagraph);     
//replaces the third verb in the paragraph with user entered verb in bold text
$stringParagraph = str_replace('NOUN1', 
$stringFirstNoun, $stringParagraph);     
//replaces the first verb in the paragraph with user entered verb in bold text
$stringParagraph = str_replace('NOUN2', 
$stringSecondNoun, $stringParagraph);     
//replaces the second verb in the paragraph with user entered verb in bold text
$stringParagraph = str_replace('NOUN3', 
$stringThirdNoun, $stringParagraph);     
//replaces the third verb in the paragraph with user entered verb in bold text
$stringParagraph = str_replace('ADJ1', 
$stringFirstAdj, $stringParagraph);     
//replaces the first verb in the paragraph with user entered verb in bold text
$stringParagraph = str_replace('ADJ2', 
$stringSecondAdj, $stringParagraph);     
//replaces the second verb in the paragraph with user entered verb in bold text
$stringParagraph = str_replace('ADJ3', 
$stringThirdAdj, $stringParagraph);     
//replaces the third verb in the paragraph with user entered verb in bold text

echo $stringParagraph;          //outputs modified paragraph

echo "<br><br><br>";
echo "<a href='project1.html'>Enter another Madlibs!</a>";      //button to html page


//write paragraph to a txt file
$results = "results.txt";
//$resultsLink = fopen($results, 'a');
$stringFileParagraph = $stringParagraph;
//fwrite($resultsLink, 
$stringFileParagraph);
//fclose($resultsLink);

file_put_contents($results, 
$stringFileParagraph, FILE_APPEND); 
//saves the contents to a textfile, if textfile exists new entry will be added




}//end second else

}//end first else






?>

---

当您用相应的值替换令牌（如
VERB1
）时，您希望将该值用粗体标记包装。因此：

$stringParagraph = str_replace('VERB1', 
$stringFirstVerb, $stringParagraph);

应该是：

$stringParagraph = str_replace('VERB1', 
"<b>".$stringFirstVerb."</b>", $stringParagraph);

$stringparagration=str_replace（'VERB1'，
“.$stringFirstVerb.”，$String段落）；
$stringparagration=str\u replace（'VERB2'，
“.$stringSecondVerb.”，$String段落）；

然后，highlight类可以使用您想要的任何CSS为替换设置样式，以便将来进行更改

另外，您可能需要对变量进行一些清理，否则您也可以直接使用post数组。由于您没有使用此代码进行任何数据库工作，您的主要风险是有人试图嵌入隐藏的脚本，因此您应该查看strip_标记或preg_替换以清除不需要的/潜在危险的标记

正如一个想法，你可以不用一长串的变量来构建一个key=>value数组，然后你可以在数组中循环（或者更好地编写一个函数）来替换字符串，如果你添加额外的输入（例如verb4），这将使它更容易扩展。除非你在这里展示的代码之外使用这些变量？
我真的不太明白你的问题？
如果用户以小写形式输入名词/动词，您可能希望执行操作，但如果用户输入的名词/动词带有用户输入的其中一个字母，则大写操作失败

在组合所有变量之前，可以使用strtolower（）函数/

试试这个：

$stringNewStr = implode ("", array ($ stringFirstVerb, $ stringSecondVerb, $stringThirdVerb, $ stringFirstNoun, $ stringSecondNoun, $ stringThirdNoun, $stringFirstAdj, $ stringSecondAdj, $ stringSecondAdj, $ stringThirdAdj));

$stringNewStrLow = strtolower($stringNewStr);

注意：根据HTML5规范，当没有其他更合适的标记时，该标记应作为最后手段使用。HTML5规范规定标题应使用to标记表示，强调文本应使用标记表示，重要文本应使用标记表示，标记/突出显示的文本应使用标记。我将代码应用到我的行中，它们没有受到影响。我将更深入地研究span类，看看是否可以使其正常工作。谢谢你的建议。更新：代码运行得很好，非常感谢您的帮助！需要明确的是，span是一个html标记，类是用于CSS的，我假设您知道如何使用CSS和CSS类等-highlight类是示例的任意名称，不会自动执行任何操作。如果不是这样的话，那么就这么说，我会更新答案您的变量无效，
$
和变量名之间不能有空格。另外，请使用较新的缩写
[]
代替
array（）
。
$stringNewStr = implode ("", array ($ stringFirstVerb, $ stringSecondVerb, $stringThirdVerb, $ stringFirstNoun, $ stringSecondNoun, $ stringThirdNoun, $stringFirstAdj, $ stringSecondAdj, $ stringSecondAdj, $ stringThirdAdj));

$stringNewStrLow = strtolower($stringNewStr);