我有一个脚本，用户可以从数据库中找到练习，我有一个复选框，供用户查找特定练习，当从每个复选框组中选择至少1个复选框时脚本正常工作但是我希望如果没有复选框被选中然后它将是所有复选框的结果。
我的复选框表格如下所示
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post" name="criteria">
<p><strong>MUSCLE GROUP</strong></p>
<input type="checkbox" name="muscle[]" id="abdominals" value="abdominals"/>Abdominals<br />
<input type="checkbox" name="muscle[]" id="biceps" value="biceps" />Biceps<br />
<input type="checkbox" name="muscle[]" id="calves" value="calves" />Calves<br />
ect...
<br /><p><strong>EQUIPMENT (please select a least one)</strong></p>
<input type="checkbox" name="equipment[]" id="equipment" value="bands"/>Bands<br />
<input type="checkbox" name="equipment[]" id="equipment" value="barbell" />Barbell<br />
<input type="checkbox" name="equipment[]" id="equipment" value="dumbbell" />Dumbbell<br />
ect....
<input type="submit" name="sub" value="Generate Query" />
</form>
这是我的脚本
<?php
if(isset($_POST['muscle']) && !empty($_POST['muscle'])){
if(isset($_POST['equipment']) && !empty($_POST['equipment'])){
//get the function
include ($_SERVER['DOCUMENT_ROOT'] .'/scripts/functions.php');
$page = (int) (!isset($_GET["page"]) ? 1 : $_GET["page"]);
$limit = 14;
$startpoint = ($page * $limit) - $limit;
// Runs mysql_real_escape_string() on every value encountered.
$clean_muscle = array_map('mysql_real_escape_string', $_REQUEST['muscle']);
$clean_equipment = array_map('mysql_real_escape_string', $_REQUEST['equipment']);
// Convert the array into a string.
$muscle = implode("','", $clean_muscle);
$equipment = implode("','", $clean_equipment);
$options = array();
if(array($muscle))
{
$options[] = "muscle IN ('$muscle')";
}
if(array($equipment))
{
$options[] = "equipment IN ('$equipment')";
}
$fullsearch = implode(' AND ', $options);
$statement = "mytable";
if ($fullsearch <> '') {
$statement .= " WHERE " . $fullsearch;
}
if(!$query=mysql_query("SELECT * FROM {$statement} LIMIT {$startpoint} , {$limit}"))
{
echo "Cannot parse query";
}
elseif(mysql_num_rows($query) == 0) {
echo "No records found";
}
else {
echo "";
while($row = mysql_fetch_assoc($query)) {
echo "".$row['name'] ."</br>
".$row['description'] ."";
}
}
echo "<div class=\"new-pagination\">";
echo pagination($statement,$limit,$page);
echo "</div>";
}
}
我是php的新手，所以我的代码可能不是最好的。如果有人能帮助我或指出我正确的方向，我会非常感激。
答案 0 :(得分：0)
好的 - 我想我已经弄明白了。你是对的 - 主要问题在于你的isset和isempty来电。我在您的文件上创建了一些变体，这显示了正在发生的事情。注意 - 因为我没有你的某些“其他”功能，所以我只会显示你函数外部出现的问题。
在下面的代码中，我在输入表单中添加了两个JavaScript函数;这些松散地基于您在谷歌“JavaScript验证复选框”时可以找到的脚本。 oneBoxSet(groupName)函数将查看所有文档元素;找到checkBox类型的那些，看看是否检查了其中一个，如果是，则确认它属于groupName。现在，它返回“true”或“false”。调用函数validateMe(formName)运行您的验证。通过添加
onclick="validateMe('criteria'); return false;"
到submit按钮的代码。这基本上说“使用此参数调用此函数以验证表单”。在这种情况下，该功能“修复”数据并提交;但你可以想象它会返回“false”，在这种情况下，提交动作将被取消。
在validateMe函数中，我们检查每组中是否至少检查了一个框;如果不是，则相应地设置“all []”组中的隐藏框。
我稍微更改了代码 - 它调用了一个不同的脚本（muscle.php）而不是你拥有的<?php echo $_SERVER['PHP_SELF']; ?> ......显然原理是相同的。
在这个初始代码之后，我们将查看我在muscle.php中添加的一些内容，以确认原始问题是什么。
<html>
<head>
<script type="text/javascript">
// go through all checkboxes; see if at least one with name 'groupName' is set
// if so, return true; otherwise return false
function oneBoxSet(groupName)
{
var c=document.getElementsByTagName('input');
for (var i = 0; i<c.length; i++){
if (c[i].type=='checkbox')
{
if (c[i].checked) {
if (c[i].name == groupName) {
return true; // at least one box in this group is checked
}
}
}
}
return false; // never found a good checkbox
}
function setAllBoxes(groupName, TF)
{
// set the 'checked' property of all inputs in this group to 'TF' (true or false)
var c=document.getElementsByTagName('input');
// alert("setting all boxes for " + groupName + " to " + TF);
for (var i = 0; i<c.length; i++){
if (c[i].type=='checkbox')
{
if (c[i].name == groupName) {
c[i].checked = TF;
}
}
}
return 0;
}
// this function is run when submit is pressed:
function validateMe(formName) {
if (oneBoxSet('muscle[]')) {
document.getElementById("allMuscles").value = "selectedMuscles";
//alert("muscle OK!");
}
else {
document.getElementById("allMuscles").value = "allMuscles";
// and/or insert code that sets all boxes in this group:
setAllBoxes('muscle[]', true);
alert("No muscle group was selected - has been set to ALL");
}
if (oneBoxSet('equipment[]')) {
document.getElementById("allEquipment").value = "selectedEquipment";
//alert("equipment OK!");
}
else {
document.getElementById("allEquipment").value = "allEquipment";
// instead, you could insert code here that sets all boxes in this category to true
setAllBoxes('equipment[]', true);
alert("No equipment was selected - has been set to ALL");
}
// submit the form - function never returns
document.forms[formName].submit();
}
</script>
</head>
<body>
<form action="muscle.php" method="post" name="criteria">
<p><strong>MUSCLE GROUP</strong></p>
<input type="checkbox" name="muscle[]" id="abdominals" value="abdominals"/>Abdominals<br />
<input type="checkbox" name="muscle[]" id="biceps" value="biceps" />Biceps<br />
<input type="checkbox" name="muscle[]" id="calves" value="calves" />Calves<br />
<input type="hidden" name="all[]" id="allMuscles" value="selectedMuscles" />
etc...<br>
<br /><p><strong>EQUIPMENT (please select a least one)</strong></p>
<input type="checkbox" name="equipment[]" id="equipment" value="bands"/>Bands<br />
<input type="checkbox" name="equipment[]" id="equipment" value="barbell" />Barbell<br />
<input type="checkbox" name="equipment[]" id="equipment" value="dumbbell" />Dumbbell<br />
<input type="hidden" name="all[]" id="allEquipment" value="selectedEquipment" />
<br>
<input type="submit" name="sub" value="Generate Query" onclick="validateMe('criteria'); return false;" />
</form>
</body>
</html>
现在这是php脚本的新开始。它会检查您在原始脚本开始时测试的条件，并演示如果未在其中一个组中设置复选框，则永远不会超过初始if语句。我建议你完全不考虑这些测试，而是从我编写的代码中获取灵感来解决任何问题。例如，您可以测试是否设置了equipmentAll或muscleAll，并相应地创建相应的查询字符串。
<?php
echo 'file was called successfully<br><br>';
if(isset($_POST['muscle'])) {
echo "_POST[muscle] is set<br>";
print_r($_POST[muscle]);
echo "<br>";
if (!empty($_POST['muscle'])) {
echo "_POST[muscle] is not empty!<br>";
}
else {
echo "_POST[muscle] is empty!<br>";
}
}
else {
echo "_POST[muscle] is not set: it is empty!<br>";
}
if(isset($_POST['equipment'])) {
echo "_POST[equipment] is set<br>";
print_r($_POST['equipment']);
echo "<br>";
if (!empty($_POST['equipment'])) {
echo "_POST[equipment] is not empty!<br>";
}
else {
echo "_POST[equipment] is empty!<br>";
}
}
else {
echo "_POST[equipment] is not set: it is empty!<br>";
}
if(isset($_POST['all'])) {
echo "this is what you have to do:<br>";
print_r($_POST['all']);
echo "<br>";
}
// if(isset($_POST['muscle']) && !empty($_POST['muscle'])){
// if(isset($_POST['equipment']) && !empty($_POST['equipment'])){
如果你在没有选中复选框的情况下调用它，你会得到两个对话框（'不行！'），然后是以下输出：
file was called successfully
_POST[muscle] is not set: it is empty!
_POST[equipment] is not set: it is empty!
this is what you have to do:
Array ( [0] => allMuscles [1] => allEquipment )
如果您在第一组中选择了几个方框，而在第二组中没有方框：
file was called successfully
_POST[muscle] is set
Array ( [0] => abdominals [1] => calves )
_POST[muscle] is not empty!
_POST[equipment] is not set: it is empty!
this is what you have to do:
Array ( [0] => selectedMuscles [1] => allEquipment )
我不声称写出漂亮的代码;但我希望这是有用的，让你摆脱你所处的修复。祝你好运！