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php - 用PHP在变量中加粗特定文本？

问题描述

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，并且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）。一切都运行良好，除了我试图让用户输入的名词和动词的字体以粗体显示，但是我不知道在哪里加粗文本。任何建议或指示将不胜感激。 

<?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






?>

我一直在尝试使用 str_replace 命令修改 $stringParagraph 中的字符串，但没有成功。简而言之，我要做的就是向用户显示 $stringParagraph 的内容，其中 $stringFirstNoun/SecondNoun 的内容是粗体的。

标签： phpfonts

解决方案

$stringParagraph = str_replace('VERB2', 
'<span class="highlight">' . $stringSecondVerb . '</span>', $stringParagraph);

然后高亮类可以用你想要的任何 CSS 来设置替换样式，以便将来轻松更改

另外，您可能值得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，因此您的主要风险是有人试图嵌入隐藏脚本，您应该查看 strip_tags 或 preg_replace 以清除不需要的/潜在危险的标签。

就像一个想法一样，您是否可以代替一长串变量构建一个 key => value 数组，然后您可以遍历该数组（甚至更好地编写一个函数）来替换您的字符串，这将使其更容易扩展您是否应该添加额外的输入（例如verb4）。除非您在此处显示的代码之外的某处使用这些变量？

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