多個字段的PHP搜索

Question

我想用多字段搜索選項（例如名稱，學院，部門，年份，國籍e.t.c）使用ajax方法搜索數據。我有插入名稱進行搜索，其餘的字段都是空的，比它去foreach循環，但如果（isset（$ _ GET [$ field]）& &！empty（$ _ GET ['$ field']））condition not success and去其他迴路

$fields = array(
    'name' => TRUE, 
    'gender' => TRUE, 
    'colf' => TRUE, 
    'deptf' => TRUE, 
    'natf' => TRUE, 
    'fstatusf' => TRUE, 
    'fyearf' => TRUE 
); 
foreach ($fields as $field => $like) { 
    if (isset($_GET[$field]) && !empty($_GET['$field'])) { 
    $value = $_GET[$field]; 
    $search[] = $field . ($like ? ('LIKE "%' . $value . '%"') : ('="' . $value . '"')); 
     } 
} 
    if ($search) { 
    $sql = 'SELECT * FROM fmaf WHERE ' . implode(' or ' . $search); 
    } 

else{ 
$sql="SELECT * FROM fmaf"; 

    } 

Answer 1

最後我已經找到了解決辦法，並感謝cFreed和其他誰幫助我。我最關心的是，如果用戶想只有一個字段或超過1場在下面回答這種情況下，搜索對我來說是有益的，也可以是某人：

if (empty($_GET['name']) && empty($_GET['gender']) && empty($_GET['colf']) && empty($_GET['deptf']) && empty($_GET['natf']) && empty($_GET['fstatusf']) && empty($_GET['fyearf'])) 
{ 
    $sql="select * from fmaf "; 
} 
else 
{ 
$wheres = array(); 

$sql = "select * from fmaf where "; 

if (isset($_GET['name']) and !empty($_GET['name'])) 
{ 
    $wheres[] = "name like '%{$_GET['name']}%' "; 
} 

if (isset($_GET['gender']) and !empty($_GET['gender'])) 
{ 
    $wheres[] = "gender = '{$_GET['gender']}'"; 
} 

if (isset($_GET['colf']) and !empty($_GET['colf'])) 
{ 
    $wheres[] = "college = '{$_GET['colf']}' "; 
} 

if (isset($_GET['deptf']) and !empty($_GET['deptf'])) 
{ 
    $wheres[] = "department = '{$_GET['deptf']}' "; 
} 

if (isset($_GET['natf']) and !empty($_GET['natf'])) 
{ 
    $wheres[] = "nationality = '{$_GET['natf']}' "; 
} 

if (isset($_GET['fstatusf']) and !empty($_GET['fstatusf'])) 
{ 
    $wheres[] = "finalstatus = '{$_GET['fstatusf']}' "; 
} 

if (isset($_GET['fyearf']) and !empty($_GET['fyearf'])) 
{ 
    $wheres[] = "fyear = '{$_GET['fyearf']}' "; 
} 

foreach ($wheres as $where) 
{ 
$sql .= $where . ' AND '; // you may want to make this an OR 
    } 
$sql=rtrim($sql, "AND "); 

    } 

Answer 2

您需要根據請求構建查詢。 玩具的例子是這樣的：

$sql = "select * from student where 1 = 1".(isset($name)?" AND name like '%$name%":"").(isset($country)?" AND country = '$country'":"").";"; 

Answer 3

你可以用一個簡單的方法，能夠面對任何情況下，像這樣：

// define searchable fields, with option for LIKE|EQUAL (TRUE|FALSE) 
$fields = [ 
    'name' => TRUE, 
    'country' => TRUE, 
    'address' => TRUE, 
    'gender' => FALSE, 
    'state' => FALSE 
]; 
foreach ($fields as $field => $like) { 
    if (isset($_GET[$field]) AND !empty($_GET['$field'])) { 
    $value = $_GET[$field]; 
    // prepare WHERE condition item, depending on LIKE option 
    $search[] = $field . (
     $like ? ('LIKE "%' . $value . '%"') : ('="' . $value . '"') 
    ); 
    } 
} 
if ($search) { 
    $sql = 'SELECT * FROM student WHERE ' . implode(' AND ' . $search); 
}