我有两个网页。索引.php这包含一个表格<form id="searchForm" class="" action="search.php" method="get" style="position:absolute; top:150pt; left:10pt; font-size:17pt;"> <label for="">Postcode</label> <input type="text" id="postcode" name="postcode" value="" placeholder="AB12 3CD" oninput="checkPostcode()"> <!-- function isValidPostcode(p) { var postcodeRegEx = /[A-Z]{1,2}[0-9]{1,2} ?[0-9][A-Z]{2}/i; return postcodeRegEx.test(p); } --> <br> <label for="">Type of Course</label> <select class="" name="coursetype"> <option value="" disabled selected></option> <option value="online">Online</option> <option value="">In Person</option> </select> <br> <input type="submit" value="Search"></form>当表单提交 search.php 中的操作时搜索.php这显示了与上一页输入的数据相同的表格<?PHP $postcode = $_GET['postcode'];?> <form class="" action="search.php" method="get"> Postcode <input type="text" name="postcode" value=" <?php $postcode = str_replace('%20', ' ', $postcode); $postcode = str_replace('-', ' ', $postcode); $postcode = str_replace('%09', '', $postcode); // This line was added to try to remove the tabs echo $postcode; ?> "> Tags <select id="tagsInput" class="js-example-basic-hide-search-multi" name="specialities[]" multiple="multiple" onkeyup="filterTags()"> <option value="AL">Lorem</option> <option value="WY">ipsum</option> </select> <script> $(document).ready(function() { $('.js-example-basic-hide-search-multi').select2({language: "en"}); }) </script> </script> <input type="submit" value="Submit"></form>但是，当输入显示在 search.php 中时，输入的两侧都有两个选项卡。我该如何摆脱这个？
3 回答
莫回无
TA贡献1865条经验 获得超7个赞
有趣的是，您收到该错误是因为您使用的是 PHP。
Postcode <input type="text" name="postcode" value="
<?php
$postcode = str_replace('%20', ' ', $postcode);
$postcode = str_replace('-', ' ', $postcode);
$postcode = str_replace('%09', '', $postcode); // This line was added to try to remove
the tabs
echo $postcode;
?>
">
注意你是如何做到的，然后在下一行value="开始。<?php两者之间的空白就是造成差距的原因。只要将两者粉碎在一起，它就会消失：
Postcode <input type="text" name="postcode" value="<?php
$postcode = str_replace('%20', ' ', $postcode);
$postcode = str_replace('-', ' ', $postcode);
$postcode = str_replace('%09', '', $postcode); // This line was added to try to remove
the tabs
echo $postcode;
?>">
当渲染页面时，HTML 会自动将多个空白折叠为一个，但它会保留一个，这就是您所看到的。
我看不出有什么地方会出现额外的空白，但加上 a 也trim()没什么坏处：
Postcode <input type="text" name="postcode" value="
<?php
$postcode = str_replace('%20', ' ', $postcode);
$postcode = str_replace('-', ' ', $postcode);
$postcode = trim($postcode);
echo $postcode;
?>
">
trim()将从字符串的开头和结尾删除任何空格（以防万一用户意外添加了一些空格）。
白衣非少年
TA贡献1155条经验 获得超0个赞
问题是这部分代码中的换行符。
Postcode <input type="text" name="postcode" value="
<?php
$postcode = str_replace('%20', ' ', $postcode);
$postcode = str_replace('-', ' ', $postcode);
$postcode = str_replace('%09', '', $postcode);
echo $postcode;
?>
">
要解决此问题，请通过将行str_replace放在HTML
$postcode = str_replace('%20', ' ', $postcode);
$postcode = str_replace('-', ' ', $postcode);
$postcode = str_replace('%09', '', $postcode);
Postcode <input type="text" name="postcode" value="<?php echo $postcode ?>">
我还建议将所有POST数据验证放在 之前HTML，这样做可以使您的代码看起来更干净。
浮云间
TA贡献1829条经验 获得超4个赞
这将在两侧插入 \n
Postcode <input type="text" name="postcode" value="
<?php ...?>
">
这不会：
Postcode <input type="text" name="postcode" value="<?php
...
?>">
为了确保，你可以这样做
Postcode <input type="text" name="postcode"
value="<?=trim(str_replace('-', ' ', $postcode))?>">
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