来自函数的PHP echo$变量也写入＝“”"；到html - PHP echo $variable from function also writes ="" to html

PHP echo $variable from function also writes ="" to html

本文关键字：quot html 函数 PHP echo 变量 | 更新日期: 2023-09-27

下面的PHP还将=""写入html代码，而不是仅按预期写入变量值。如何从HTML代码中去除=""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>';
}

最后一行带有"选定"的HTML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>

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>

下面的PHP还将=""写入html代码，而不是像预期的那样只写入变量值。

每当if条件失败时，您将在value属性之后看到此=""。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;
}