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必须提交两次

session-variables forms arrays html php

Pieter de Vries · 技术社区 · 12 年前

好的,我是编程新手,我有一些复选框的问题。
我想存储是否选中复选框,并在按下按钮时显示该复选框。
我正在进行筛选搜索,所以当一个人选中复选框时,它将只显示该筛选。
然而,只有当我提交并选择或取消选择复选框两次时,它才起作用。
我怎么才能做到只做一次?

<form name="search" action="<? $_SERVER['PHP_SELF']; ?>" method="post">
   <input type="checkbox" name="checkAllMyCB" id="checkAllMyCB" onclick="jqCheckAll2( this.id, 'myCB' )"/>All
   <input name="category[]" type="checkbox" <? if (in_array("art", $_SESSION['category'])) { echo "checked='checked'";  } ?>value="art">Art
   <input name="category[]" type="checkbox" <? if (in_array("church", $_SESSION['category'])) { echo "checked='checked'";  } ?>value="church">Church
   <input name="category[]" type="checkbox" <? if (in_array("education", $_SESSION['category'])) { echo "checked='checked'";  } ?>value="education">Education/Schools
   <input name="category[]" type="checkbox" <? if (in_array("food", $_SESSION['category'])) { echo "checked='checked'";  } ?>value="food">Food
   <input name="category[]" type="checkbox" <? if (in_array("gardening", $_SESSION['category'])) { echo "checked='checked'";  } ?>value="gardening">Gardening
   <input name="category[]" type="checkbox" <? if (in_array("kids", $_SESSION['category'])) { echo "checked='checked'";  } ?>value="kids">Kids
   <input name="category[]" type="checkbox" <? if (in_array("music", $_SESSION['category'])) { echo "checked='checked'";  } ?>value="music">Music
   <input name="category[]" type="checkbox" <? if (in_array("outdoors", $_SESSION['category'])) { echo "checked='checked'";  } ?>value="outdoors">Outdoors
   <input name="category[]" type="checkbox" <? if (in_array("seniors", $_SESSION['category'])) { echo "checked='checked'";  } ?>value="seniors">Seniors
   <input name="category[]" type="checkbox" <? if (in_array("sports", $_SESSION['category'])) { echo "checked='checked'";  } ?> value="sports">Sports/Physical Activity
   <input name="category[]" type="checkbox" <? if (in_array("support", $_SESSION['category'])) { echo "checked='checked'";  } ?>value="support">Club/Support Group
   <input type="submit" name="Go2" id="Go2" value="Go &gt;" />
<? 
$_SESSION['category'] = $_POST['category']; ?>

</form>

1 回复 | 直到 12 年前

AyB 12 年前

二代码中出现错误:

首先显示表单,然后将值设置到 SESSION 。这应该是相反的方式,因为当提交时,表单将首先显示,并且只有在设置值之后才会显示,这就是为什么您需要提交两次以查看值的问题。
您没有检查 会话 变量已在 in_array ,这最初会抛出一个错误。与 $_POST['category']

首先将其放在顶部:

<?
if (isset($_POST['category'])){
$_SESSION['category'] = $_POST['category']; }
else
{
    unset($_SESSION['category']);
}
?>

然后将表单代码更改为:

<form name="search" action="" method="post">
   <input type="checkbox" name="checkAllMyCB" id="checkAllMyCB" onclick="jqCheckAll2( this.id, 'myCB' )"/>All
   <input name="category[]" type="checkbox" <?php if (isset($_SESSION['category']) && in_array("art", $_SESSION['category'])) { echo "checked='checked'";  } ?> value="art">Art
   <input name="category[]" type="checkbox" <?php if (isset($_SESSION['category']) && in_array("church", $_SESSION['category'])) { echo "checked='checked'";  } ?> value="church">Church
   <input name="category[]" type="checkbox" <?php if (isset($_SESSION['category']) && in_array("education", $_SESSION['category'])) { echo "checked='checked'";  } ?> value="education">Education/Schools
   <input name="category[]" type="checkbox" <?php if (isset($_SESSION['category']) && in_array("food", $_SESSION['category'])) { echo "checked='checked'";  } ?> value="food">Food
   <input name="category[]" type="checkbox" <?php if (isset($_SESSION['category']) && in_array("gardening", $_SESSION['category'])) { echo "checked='checked'";  } ?>value="gardening">Gardening
   <input name="category[]" type="checkbox" <?php if (isset($_SESSION['category']) && in_array("kids", $_SESSION['category'])) { echo "checked='checked'";  } ?> value="kids">Kids
   <input name="category[]" type="checkbox" <?php if (isset($_SESSION['category']) && in_array("music", $_SESSION['category'])) { echo "checked='checked'";  } ?> value="music">Music
   <input name="category[]" type="checkbox" <?php if (isset($_SESSION['category']) && in_array("outdoors", $_SESSION['category'])) { echo "checked='checked'";  } ?> value="outdoors">Outdoors
   <input name="category[]" type="checkbox" <?php if (isset($_SESSION['category']) && in_array("seniors", $_SESSION['category'])) { echo "checked='checked'";  } ?> value="seniors">Seniors
   <input name="category[]" type="checkbox" <?php if (isset($_SESSION['category']) && in_array("sports", $_SESSION['category'])) { echo "checked='checked'";  } ?> value="sports">Sports/Physical Activity
   <input name="category[]" type="checkbox" <?php if (isset($_SESSION['category']) && in_array("support", $_SESSION['category'])) { echo "checked='checked'";  } ?> value="support">Club/Support Group
   <input type="submit" name="Go2" id="Go2" value="Go &gt;" />
</form>