删除部分字符串

Question

<?php
 $test = 'marke=' . $_GET["marke"] . '&farbe=' . $_GET["farbe"]. '&groesse=' . $_GET["groesse"];
?>

 <?php
echo $test;
?>

回声将是：marke = diesel＆amp; farbe = blau＆amp; groesse = xl

如何从$ test中删除＆amp; farbe = blau？

Answer 1

使用parse_str和http_build_query可靠地解析和创建查询字符串（这也会处理令人讨厌的网址编码问题）：

// You could probably have created $test with:
// $test = http_build_query($_GET);
parse_str($test,$values);
unset($values['farbe']);
$test = http_build_query($values);

Answer 2

您是否尝试过使用a regular expression with preg_replace()？在我的头顶，尝试类似：

preg_replace('/&farbe=.+?&/','',$test);