Question

我似乎无法弄清楚这一点。我有4个多重复选框并使用implode存储它们...然后尝试用爆炸来抓取它们进行比较。我需要显示表单并检查其值，因此我需要查看他们检查的内容并默认显示该框为管理员审核。似乎没有爆炸工作，因为它将字符串存储在索引0

存储到数据库：

$pulled = implode(",",$pulled);

从数据库中检索

<?php          
$pulled = '{pulled}';   // (expression engine CMS field)
echo "before Explode: $pulled <br>";
  // returns:  before Explode: Tanker,End/Bottom Dump,Flatbed,Van 

$pulled = explode(",",$pulled);      
echo "after Explode: <br>";                                    
var_dump($pulled);
  // returns: after Explode: 
              array(1) { [0]=> string(8) "Tanker,End/Bottom Dump,Flatbed,Van" }  


$pos = strpos($pulled[0], 'Tanker');
if ($pos === false) {
   echo "<br><br>The string 'Tanker' was not found in the string '$pulled[0]'";
} else {
   echo "<br>The string 'Tanker' was found in the string '$pulled[0]'";
}

Answer 1

它应该是：

if ($pulled[0] != 'Tanker') {
   echo "<br><br>The string 'Tanker' was not found in the string '$pulled[0]'";
} else {
   echo "<br>The string 'Tanker' was found in the string '$pulled[0]'";
}

因为正如您在var_dump的结果中看到的那样，数组的元素0正是您要搜索的字符串。所以不需要做任何其他事情，只需比较它。如果这不起作用，那么您没有正确获取原始字符串。此代码适用于我的机器：

$pulled = 'Tanker,End/Bottom Dump,Flatbed,Van ';
$pulled = explode(",",$pulled);      

if ($pulled[0] != 'Tanker') {
   echo "<br><br>The string 'Tanker' was not found in the string '$pulled[0]'";
} else {
   echo "<br>The string 'Tanker' was found in the string '$pulled[0]'";
}

Answer 2

也许你打算在整个弦乐中寻找油轮？

$pos = strpos($pulled, 'Tanker');
if ($pos === false) {
   echo "<br><br>The string 'Tanker' was not found in the string '$pulled'";
} else {
   echo "<br>The string 'Tanker' was found in the string '$pulled'";
}

从mysql DB中检索多个复选框

2 个答案: