我正在尝试从数据库中删除一些信息，但是当我要求用户确认操作时，出现了问题。你能帮帮我吗？
如果没有解决，脚本会打印要选择的类别。然后，它要求用户删除或不删除所选类别。最后，它会删除所选择的内容。
但是最后一部分(脚本的第一部分)有一些错误，我无法理解哪里出了问题:
<?php
//If the user confirm to delete...
if(isset($_POST['eliminazione_conferma']) and $_POST['eliminazione_conferma']=='conferma'){
//if conferma_eliminazione=1, don't delete
if(isset($_POST['conferma_eliminazione']) and $_POST['conferma_eliminazione']=='1'){
echo 'Eliminazione annullata';
}else{//Delete if conferma_eliminazione=0
while($row=$categoria){
$delete= "DELETE FROM categorie WHERE $row = category_id";
$query=mysql_query($delete);
echo "$row eliminato\n";
}
}
}else{//ELSE, print the form to confirm action
if(isset($_POST['eliminazione']) and $_POST['eliminazione']=='delete'){
//Array with the chosen "categories"
$categoria=isset($_POST['categoria']) ? $_POST['categoria'] : array();
//Print the chosen categories to ask confirmation
echo'Sicuro di voler eliminare le seguenti categoire?<br />';
foreach($categoria as $row){
echo "$row<br />\n";
}
//Yes = 0, No = 1
echo '<form method="post" action="',$_SERVER['REQUEST_URI'],'">
<input type="radio" name="conferma_elimiazione" value="0" />Si<br />
<input type="radio" name="conferma_eliminzione" value="1" />No<br />
<input type="hidden" name="eliminazione_conferma" value="conferma" />';
foreach($categoria as $row){
echo'<input type="hidden" name="categoria[]" value="',$row,'" />',"\n",'' ;
}
echo'
<input type="submit" value="Conferma" />
</form>';
}else{//In the end, if nothing is settled, print the form to check the category to delete
//Select the categories from the database
echo'<form method="post" action="',$_SERVER['REQUEST_URI'],'" />',"\n",'';
$select = "SELECT nome,category_id FROM categorie ORDER BY category_id" ;
$select_result=mysql_query($select) or die("Mysql Error: ".mysql_error());
while($row = mysql_fetch_assoc($select_result)){
echo '<input type="checkbox" name="categoria[]" value="',$row['category_id'],'">',$row['nome'],'<br />';
}
echo'<input type="hidden" name="eliminazione" value="delete" />
<input type="submit" name="submit" value="Elimina" />
</form>';
}
}
最佳答案
查询的问题
$delete= "DELETE FROM categorie WHERE $row = category_id";
是
这里
WHERE $row = category_id";
什么是category_id？
你认为它有值(value)吗？
可能你想要WHERE category_id=/*这里有像$row['column_name']*/这样的东西
关于php - 从数据库中删除数据时出错，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32981623/