我有以下PHP PDO语句：

$STH = $this->_db->prepare("INSERT INTO UserDetails (FirstName, LastName,

Address, City, County, PostCode, Phone, Mobile, Sex, DOB,

FundraisingAim, WeeksAim, LengthsAim, HearAboutID,

MotivationID, WelcomePackID, ContactPrefID, TitleID)

VALUES

(:firstName, :lastName, :address, :city, :county, :postCode,

:phone, :mobile, :sex, :DOB, :fundraisingAim, :weeksAim,

:lengthsAim, :hearAbout, :motivation,

:welcomePackPref, :contactPref, :title)");

$STH->execute($userData);

其中$userData是一个关联数组.我仔细检查了名称,我不明白为什么我收到以下错误：

SQLSTATE [HY093]：参数号无效：绑定变量数与令牌数不匹配

我犯了什么愚蠢的错误？

解决方法:

您的$userData必须具有与您的语句绑定的完全相同的占位符,不多也不少.请参阅PDOStatement::execute documentation,该部分显示“您无法绑定多于指定值的值”.

你需要准备你的参数execute()来准确匹配你的绑定.如果正确排列数组,使用array_intersect_key()很容易.我通常将它包装在一个函数中,它也会处理前缀,如下所示：

// Adds a prefix to a name for a named bind placeholder

function prefix($name) {

return ':'.$name;

}

// like 'prefix()', but for array keys

function prefix_keys($assoc) {

// prefix STRING keys

// Numeric keys not included

$newassoc = array();

foreach ($assoc as $k=>$v) {

if (is_string($k)) {

$newassoc[prefix($k)] = $v;

}

}

return $newassoc;

}

// given a map of datakeyname=>columnname, and a table name, returns an

// sql insert string with named bind placeholder parameters.

function makeInsertStmt($tablename, $namemap) {

$binds = array_map('prefix', array_keys($namemap));

return 'INSERT INTO '.$tablename.' ('.implode(',',$namemap).') VALUES ('

.implode(',',$binds).')';

}

// returns an array formatted for an `execute()`

function makeBindData($data, $namemap) {

// $data assoc array, $namemap name->column mapping

return prefix_keys(array_intersect_key($data, $namemap));

}

// example to demonstrate how these pieces fit together

function RunTestInsert(PDO $pdo, $userData) {

$tablename = 'UserDetails';

// map "key in $userData" => "column name"

// do not include ':' prefix in $userData

$namemap = array(

'firstName' => "FirstName",

'lastName' => "LastName",

'address' => "Address",

'city' => "City",

'county' => "County",

'postCode' => "PostCode",

'phone' => "Phone",

'mobile' => "Mobile",

'sex' => "Sex",

'DOB' => "DOB",

'fundraisingAim' => "FundraisingAim",

'weeksAim' => "WeeksAim",

'lengthsAim' => "LengthsAim",

'hearAbout' => "HearAboutID",

'motivation' => "MotivationID",

'welcomePackPref' => "WelcomePackID",

'contactPref' => "ContactPrefID",

'title' => "TitleID",

);

$sql = makeInsertStmt($tablename, $namemap);

$binddata = makeBindData($userData, $namemap);

$pstmt = $pdo->prepare($sql);

$pstmt->execute($binddata);

}

像这样的抽象的好处是你不需要担心绑定参数本身.

标签：php,arrays,mysql,pdo,associative-array

来源： https://codeday.me/bug/20190923/1814246.html