Php 需要foreach跳过/忽略缺少的数组
我有这个php代码,用于从我的源插入数据Php 需要foreach跳过/忽略缺少的数组,php,Php,我有这个php代码,用于从我的源插入数据 $i = 1; foreach ( $_POST['form'] as $val => $form ){ $Style = $_POST['form'][$i]['style']; $Dim= $_POST['form'][$i]['Dim']; $Colour= $_POST['form'][$i]['Colour']; $Quantity= $_POST['form'][$i]['Quantity'];
$i = 1;
foreach ( $_POST['form'] as $val => $form ){
$Style = $_POST['form'][$i]['style'];
$Dim= $_POST['form'][$i]['Dim'];
$Colour= $_POST['form'][$i]['Colour'];
$Quantity= $_POST['form'][$i]['Quantity'];
$stmt = $db->prepare("INSERT INTO orders(Cus_ID, Style, Dimensions, Colour, Quantity) VALUES(:Cus_ID,:Style,:Dimensions,:Colour,:Quantity)");
$stmt->execute(array(':Cus_ID' => $Cus_ID, ':Style' => $Style, ':Dimensions' => $Dim, ':Colour' => $Colour, ':Quantity' => $Quantity));
$i++;
}
当我提交我的表格时,var_dump会给我这样的东西
array (size=3)
'form' =>
array (size=3)
1 =>
array (size=4)
'style' => string '0' (length=1)
'Dim' => string '0' (length=1)
'Colour' => string '0' (length=1)
'Quantity' => string '' (length=0)
2 =>
array (size=4)
'style' => string '0' (length=1)
'Dim' => string '0' (length=1)
'Colour' => string '0' (length=1)
'Quantity' => string '' (length=0)
3 =>
array (size=4)
'style' => string '0' (length=1)
'Dim' => string '0' (length=1)
'Colour' => string '0' (length=1)
'Quantity' => string '' (length=0)
'submit' => string 'Place Order' (length=11)
array (size=2)
'form' =>
array (size=2)
1 =>
array (size=4)
'style' => string '0' (length=1)
'Dim' => string '0' (length=1)
'Colour' => string '0' (length=1)
'Quantity' => string '' (length=0)
3 =>
array (size=4)
'style' => string '0' (length=1)
'Dim' => string '0' (length=1)
'Colour' => string '0' (length=1)
'Quantity' => string '' (length=0)
'submit' => string 'Place Order' (length=11)
一切都很好,但是当我删除我的表格的一部分时,提交的表格就会变成这样
array (size=3)
'form' =>
array (size=3)
1 =>
array (size=4)
'style' => string '0' (length=1)
'Dim' => string '0' (length=1)
'Colour' => string '0' (length=1)
'Quantity' => string '' (length=0)
2 =>
array (size=4)
'style' => string '0' (length=1)
'Dim' => string '0' (length=1)
'Colour' => string '0' (length=1)
'Quantity' => string '' (length=0)
3 =>
array (size=4)
'style' => string '0' (length=1)
'Dim' => string '0' (length=1)
'Colour' => string '0' (length=1)
'Quantity' => string '' (length=0)
'submit' => string 'Place Order' (length=11)
array (size=2)
'form' =>
array (size=2)
1 =>
array (size=4)
'style' => string '0' (length=1)
'Dim' => string '0' (length=1)
'Colour' => string '0' (length=1)
'Quantity' => string '' (length=0)
3 =>
array (size=4)
'style' => string '0' (length=1)
'Dim' => string '0' (length=1)
'Colour' => string '0' (length=1)
'Quantity' => string '' (length=0)
'submit' => string 'Place Order' (length=11)
如果php尝试输入不存在的“第二个”数组,是否可以让php“跳过/忽略”任何缺少的数组(数组是无限的,任何随机数都可能缺少)是的,只要没有设置当前索引,就可以 但是,您根本没有理由使用
$i
。编写foreach
循环是为了让您能够以$form
的形式访问每个表单,因此只需使用$form
:
是的,这是可能的,只要不设置当前索引即可 但是,您根本没有理由使用
$i
。编写foreach
循环是为了让您能够以$form
的形式访问每个表单,因此只需使用$form
:
在foreach中,您不需要使用
$i
$val
是子数组的键$form
是子阵列,可以用作:
foreach ( $_POST['form'] as $val => $form ){
$Style = $form['style'];
$Dim= $form['Dim'];
$Colour= $form['Colour'];
$Quantity= $form['Quantity'];
$stmt = $db->prepare("INSERT INTO orders(Cus_ID, Style, Dimensions, Colour, Quantity) VALUES(:Cus_ID,:Style,:Dimensions,:Colour,:Quantity)");
$stmt->execute(array(':Cus_ID' => $Cus_ID, ':Style' => $Style, ':Dimensions' => $Dim, ':Colour' => $Colour, ':Quantity' => $Quantity));
}
所以,为了回答您的问题,foreach永远不会到达缺少的数组。它循环遍历数组元素,因此,如果数组有两个元素,它将迭代两次。如果数组有三个元素,它将迭代3次,以此类推。在foreach中,您不需要使用
$i
$val
是子数组的键$form
是子阵列,可以用作:
foreach ( $_POST['form'] as $val => $form ){
$Style = $form['style'];
$Dim= $form['Dim'];
$Colour= $form['Colour'];
$Quantity= $form['Quantity'];
$stmt = $db->prepare("INSERT INTO orders(Cus_ID, Style, Dimensions, Colour, Quantity) VALUES(:Cus_ID,:Style,:Dimensions,:Colour,:Quantity)");
$stmt->execute(array(':Cus_ID' => $Cus_ID, ':Style' => $Style, ':Dimensions' => $Dim, ':Colour' => $Colour, ':Quantity' => $Quantity));
}
所以,为了回答您的问题,foreach永远不会到达缺少的数组。它循环遍历数组元素,因此,如果数组有两个元素,它将迭代两次。如果数组有三个元素,它将迭代3次,以此类推。是的,但为什么还要使用
$i
?您正在对每个($\u POST['form']作为$key=>$form)执行操作,因此直接访问$form
。如果(!isset($\u POST['form'][$i])继续,请添加代码>在循环的最开始处。这是你想要的,但不是你应该做的。请仔细阅读是的,但为什么你还要使用$i
?您正在对每个($\u POST['form']作为$key=>$form)
执行操作,因此直接访问$form
。如果(!isset($\u POST['form'][$i])继续,请添加代码>在循环的最开始处。这是你想要的,但不是你应该做的。通读