我有兩個網(wǎng)頁。索引.php這包含一個表格<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>當(dāng)表單提交 search.php 中的操作時搜索.php這顯示了與上一頁輸入的數(shù)據(jù)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，當(dāng)輸入顯示在 search.php 中時，輸入的兩側(cè)都有兩個選項卡。我該如何擺脫這個？
3 回答
莫回?zé)o
TA貢獻(xiàn)1865條經(jīng)驗 獲得超7個贊
有趣的是，您收到該錯誤是因為您使用的是 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="開始。<?php兩者之間的空白就是造成差距的原因。只要將兩者粉碎在一起，它就會消失：
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;
?>">
當(dāng)渲染頁面時，HTML 會自動將多個空白折疊為一個，但它會保留一個，這就是您所看到的。
我看不出有什么地方會出現(xiàn)額外的空白，但加上 a 也trim()沒什么壞處：
Postcode <input type="text" name="postcode" value="
<?php
$postcode = str_replace('%20', ' ', $postcode);
$postcode = str_replace('-', ' ', $postcode);
$postcode = trim($postcode);
echo $postcode;
?>
">
trim()將從字符串的開頭和結(jié)尾刪除任何空格（以防萬一用戶意外添加了一些空格）。
白衣非少年
TA貢獻(xiàn)1155條經(jīng)驗 獲得超0個贊
問題是這部分代碼中的換行符。
Postcode <input type="text" name="postcode" value="
<?php
$postcode = str_replace('%20', ' ', $postcode);
$postcode = str_replace('-', ' ', $postcode);
$postcode = str_replace('%09', '', $postcode);
echo $postcode;
?>
">
要解決此問題，請通過將行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 ?>">
我還建議將所有POST數(shù)據(jù)驗證放在 之前HTML，這樣做可以使您的代碼看起來更干凈。
浮云間
TA貢獻(xiàn)1829條經(jīng)驗 獲得超4個贊
這將在兩側(cè)插入 \n
Postcode <input type="text" name="postcode" value="
<?php ...?>
">
這不會：
Postcode <input type="text" name="postcode" value="<?php
...
?>">
為了確保，你可以這樣做
Postcode <input type="text" name="postcode"
value="<?=trim(str_replace('-', ' ', $postcode))?>">
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