使文本文件中的搜索不区分大小写

问题描述

我正在使用以下功能在文本文件中搜索单词.问题在于此功能区分大小写.我不希望它区分大小写！如何使函数不区分大小写?

I'm using the following function to search for words in a text file. The problem is that this function is case-sensitive. I don't want it to be case-sensitive! How can I make the function case-insensitive?

$url = 'files/file.txt';
$thedata = file_get_contents($url);
$lines = explode(PHP_EOL, $thedata);

$search = 'some search words';
$pattern = preg_quote($search, '/');
$pattern = "/^.*$pattern.*\$/m";

if(preg_match_all($pattern, $thedata, $matches)) {
    echo implode('<br>', $matches[0]);
} else {
    echo '<div class="message color-red">';
        echo 'Didn\'t find anything on that search!';
    echo '</div>';
}

推荐答案

在最后一个/之后的 m 中添加 i 您的模式字符串:

Add i in addition to the m after the last / in your pattern string:

$pattern = "/^.*$pattern.*\$/mi"

这篇关于使文本文件中的搜索不区分大小写的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！