doujiong2533 2013-08-12 02:06
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在PHP中搜索大写和小写单词？

I have a PHP file which will search in txt file and will display the result.

However, if the word is written with uppercase text and the user searches for the same word with lowercase the PHP file will show found no matches1

for example:

I have Apple Juice in the txt file. the user searches for apple juice. the PHP shows no matches found as it is looking for the exact same word "Apple Juice" which has uppercase in it.

This is my code:

<html>
<head><title>some title</title></head>
<body>

<?php
    if(!empty($_POST['search'])) {
    $file = 'mytxtfile.txt';
    $searchfor = '';
    // the following line prevents the browser from parsing this as HTML.
    header('Content-Type: text/plain');
    $searchfor = $_POST['search'];
    $contents = file_get_contents($file);
    $pattern = preg_quote($searchfor, '/');
    $fullword = '\b\Q' . $w . '\E\b';
    $regex = '/' . $fullword . '(?!.*' . $fullword . ')/i';
    $pattern = "/^.*$pattern.*\$/m";
    if(preg_match_all("/\b([a-z]+[A-Z]+[a-zA-Z]*|[A-Z]+[a-z]+[a-zA-Z]*)\b/", $pattern, $contents, $matches)){
       echo "Population: 
";
       echo implode("
", $matches[0]);

    }
    else{
       echo "No matches found";
    }
    header('Content-Type: text/html');
    }
?>

  <form method="post" action="">
    <input type="text" name="search" />
    <input type="submit" name="submit" />
  </form>

</body>
</html>

i did try and added this if(preg_match_all("/\b([a-z]+[A-Z]+[a-zA-Z]*|[A-Z]+[a-z]+[a-zA-Z]*)\b/", to my code but that didn't work!

any help would be appreciated.

Thanks

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2条回答 默认 最新

  • dsa5211314 2013-08-12 02:20
    关注

    Heres the adjusted source. This sets the search string and the file contents to lowercase. I also moved the HTML headers down and initiated the output buffer during the search logic.

    <?php
ob_start();
if(!empty($_POST['search'])) {
$file = 'mytxtfile.txt';
$searchfor = '';
// the following line prevents the browser from parsing this as HTML.
header('Content-Type: text/plain');
$searchfor = strtolower($_POST['search']); #LOWER CASE THE SEARCH STRING TO
$contents = strtolower(file_get_contents($file)); #MAIN ADDITION TO MAKE IT LOWER CASE
$pattern = preg_quote($searchfor, '/');
$fullword = '\b\Q' . $w . '\E\b';
$regex = '/' . $fullword . '(?!.*' . $fullword . ')/i';
$pattern = "/^.*$pattern.*\$/m";
if(preg_match_all("/\b([a-z]+[A-Z]+[a-zA-Z]*|[A-Z]+[a-z]+[a-zA-Z]*)\b/", $pattern,             $contents, $matches)){
   echo "Population: 
";
   echo implode("
", $matches[0]);

}
else{
   echo "No matches found";
}
header('Content-Type: text/html');
}
ob_end_flush();
?>
<html>
<head><title>some title</title></head>
<body>

<form method="post" action="">
    <input type="text" name="search" />
    <input type="submit" name="submit" />
</form>

</body>
</html>
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