Trying to access array offset of value of type bool in PHP 7.4
P粉846294303
2023-08-24 09:06:21
<p>I just upgraded my server's PHP version to PHP 7.4.1 and now I'm getting this error: </p>
<blockquote>
<p>Note: Trying to access array offset on value of type bool</p>
</blockquote>
<pre class="brush:php;toolbar:false;">public static function read($id)
{
$Row = MySQL::query("SELECT `Data` FROM `cb_sessions` WHERE `SessionID` = '$id'", TRUE);
# http://php.net/manual/en/function.session-start.php#120589
//check to see if $session_data is null before returning (CRITICAL)
if(is_null($Row['Data']))
{
$session_data = '';
}
else
{
$session_data = $Row['Data'];
}
return $session_data;
}</pre>
<p>What is the fix for PHP 7.4? </p>
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
If your query does not return a row, then your variable $Row will be filled with false, So you can test whether the variable has a value before trying to access any index inside the variable:
if($Row){ if(is_null($Row['Data'])) { $session_data = ''; }...Easy to use PHP
??Null coalescing operatorOr you can use
like this