Question

以下PHP还将=""写入html代码，而不是按预期编写变量值。如何摆脱HTML代码中的=""废话？

PHP：

while ($row = $result->fetch_assoc()) {
    $select = "";
    unset($id, $name);
    $id = $row['customerID'];
    $name = $row['name'];
    if ($_SESSION['customerID'] == $id){
        $select = 'selected';
        }
    echo '<option value="'. $id.'"'. "$select" .'>'.$name.'</option>';
}

HTML结果在最后一行显示“已选中”：

<form><select onchange="showUser(this.value)" name="id">
<option value="">Select Customer</option>
<option value="0">Customer2</option>
<option selected="" value="1">Customer1</option></select></form>

预期结果：

<form><select onchange="showUser(this.value)" name="id">
<option value="">Select Customer</option>
<option value="0">Customer2</option>
<option selected value="1">Customer1</option></select></form>

Answer 1

以下PHP还将=""写入html代码，而不是按预期编写变量值。

每当if条件失败时，您会在=""属性后看到此value。你的代码应该是这样的：

while ($row = $result->fetch_assoc()) {
    unset($id, $name);
    $id = $row['customerID'];
    $name = $row['name'];
    $option = "<option value='{$id}'";
    if ($_SESSION['customerID'] == $id){
        $option .= " selected";
    }
    $option .= ">{$name}</option>";
    echo $option;
}

来自函数的PHP echo $ variable也将=“”写入html

1 个答案: