如何在PHP中运行bind_param()语句? [英] How to run the bind_param() statement in PHP?
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问题描述
我正在尝试使以下代码正常工作,但无法到达execute()
行.
I'm trying to make the following code work but I can't reach the execute()
line.
$mysqli = $this->ConnectLowPrivileges();
echo 'Connected<br>';
$stmt = $mysqli->prepare("SELECT `name`, `lastname` FROM `tblStudents` WHERE `idStudent`=?");
echo 'Prepared and binding parameters<br>';
$stmt->bind_param('i', 2 );
echo 'Ready to execute<br>'
if ($stmt->execute()){
echo 'Executing..';
}
} else {
echo 'Error executing!';
}
mysqli_close($mysqli);
我得到的输出是:
Connected
Prepared and binding parameters
So the problem should be at line 5, but checking the manual of bind_param()
I can't find any syntax error there.
推荐答案
绑定参数时,您需要传递一个用作引用的变量:
When binding parameters you need to pass a variable that is used as a reference:
$var = 1;
$stmt->bind_param('i', $var);
请参见手册: http://php.net/manual/en/mysqli-stmt .bind-param.php
请注意,实际上不必定义$var
来绑定它.以下内容完全正确:
Note that $var
doesn't actually have to be defined to bind it. The following is perfectly valid:
$stmt->bind_param('i', $var);
foreach ($array as $element)
{
$var = $element['foo'];
$stmt->execute();
}
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