[英]Make search in text file case-insensitive
I'm using the following function to search for words in a text file. 我正在使用以下功能在文本文件中搜索单词。 The problem is that this function is case-sensitive.
问题在于此功能区分大小写。 I don't want it to be case-sensitive!
我不希望它区分大小写! How can I make the function case-insensitive?
如何使函数不区分大小写?
$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>';
}
在模式字符串的最后一个/
后面的m
后面加上i
:
$pattern = "/^.*$pattern.*\$/mi"
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