制作一個(gè)新工具并需要一個(gè)下拉菜單，但它似乎不像我編碼的那樣工作。不確定到底是什么問(wèn)題。已經(jīng)在網(wǎng)上研究過(guò)，但我一直無(wú)法弄清楚。if(!isset($_POST["ReasonList"])) { $error .= '<p><label class="text-danger">Please select a reason</label></p>'; }<div class="form-group"><label>Select Reason for Request</label><select id="ReasonList" name="ReasonList" class="form-control" value="<?php echo $ReasonList; ?>" /> <option value = "">Select...</option> <option value = "1">Original Engineer has left the company</option> <option value = "2">Actively involved in field work on customer site</option> <option value = "3">No capacity due to customer mandated deadlines</option> <option value = "4">Exception request by manager</option></select></div>如果選擇了選項(xiàng)，則可以提交表單。如果沒(méi)有選擇選項(xiàng)，它會(huì)在 if 語(yǔ)句中給出錯(cuò)誤 - 請(qǐng)選擇一個(gè)原因
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慕的地6264312
TA貢獻(xiàn)1817條經(jīng)驗(yàn) 獲得超6個(gè)贊
查看更正后的<select>元素，以及代碼縮進(jìn)如何使 HTML 更易于閱讀和調(diào)試。
<div class="form-group">
<label>Select Reason for Request</label>
<select id="ReasonList" name="ReasonList" class="form-control">
<option value = "">Select...</option>
<option value = "1">Original Engineer has left the company</option>
<option value = "2">Actively involved in field work on customer site</option>
<option value = "3">No capacity due to customer mandated deadlines</option>
<option value = "4">Exception request by manager</option>
</select>
</div>
該<select>元素沒(méi)有value屬性，并且您不小心關(guān)閉了<select>beforename屬性。
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