使用 PHP 从文本文件中查找并删除一个或多个（不区分大小写）单词

Question

需要代码方面的帮助才能获得上述主题的结果，

到目前为止，我已经使用了这个代码

<?php
$data = file_get_contents("pg1-afcCup.txt");
$data = explode(" ", $data);
$remv = "Hosts";
foreach($data as $val) {
    if($remv != $val) {
        $newdata .= $val . " ";
        // print "$val<br />\n";
        }
    }
$newdata = substr($newdata, 0, -1); // remove trailing ,
print "<br /><br />String: $newdata";
$fp = fopen("pg2-afcCup.txt", "w+");
$fw = fwrite($fp, $newdata);
fclose($fp);
?>

以上代码会删除pg1-afcCup.txt中区分大小写的"Hosts"字，并重写保存在pg2-afcCup.txt.

中

如何让它变得不敏感，并找到不止一个词（用更多词填充$remv）？

ps：我试过preg_replace没有成功...

Answer 1

试试这个

<?php 
$data = file_get_contents("pg1-afcCup.txt");
$data = explode(" ", $data);
$remv = "hosts";
$newdata = "";
foreach($data as $val) {
if($remv != strtolower($val)) {
$newdata .= $val . " ";
// print "$val<br />\n";
}
}
$newdata = substr($newdata, 0, -1); // remove trailing ,
print "<br /><br />String: $newdata";
$fp = fopen("pg2-afcCup.txt", "w+");
$fw = fwrite($fp, $newdata);
fclose($fp);
?>

它将字符串转换为小写然后检查。所以，这应该可以正常工作。

对于多个过滤器

<?php 
$data = file_get_contents("pg1-afcCup.txt");
$data = explode(" ", $data);
$remv = array("hosts","other", "somemore");
$newdata="";
foreach($data as $val) {
if (! in_array(strtolower($val),$remv) ) {
$newdata .= $val . " ";
// print "$val<br />\n";
}
}
$newdata = substr($newdata, 0, -1); // remove trailing ,
print "<br /><br />String: $newdata";
$fp = fopen("pg2-afcCup.txt", "w+");
$fw = fwrite($fp, $newdata);
fclose($fp);
?>

Answer 2

你可以试试这个 preg_replace

<?php
$data = file_get_contents("pg.txt");
$data = explode(" ", $data);
$remv = "Hosts";
$pattern = '/^hosts$/i'; # if you need to erase the exact word
#$pattern = '/hosts/i'; # erasing a substring
foreach($data as $val) {
    $newdata .= preg_replace($pattern, "", $val) . " ";
}
$newdata = substr($newdata, 0, -1); // remove trailing ,
print "<br /><br />String: $newdata";
$fp = fopen("pg2-afcCup.txt", "w+");
$fw = fwrite($fp, $newdata);
fclose($fp);
?>

使用 PHP 从文本文件中查找并删除一个或多个（不区分大小写）单词

FInd and Remove one or more (with case insensitive) word from text file with PHP

php

case-insensitive