escaping numbers in array index in php - php

Question

I was not having any luck with searching so if this is a duplicate please let me know rather than downvoting.
I have a script for a game server that fills a database with the character data (name, level, userid and character type).
Rather than deleting the whole sql table each time and recreating it, I have it perform a check on the character data in the table and compare and only update whats different. it all works nicely.
However, A certain few character names are causing issues.
[09-Sep-2017 02:16:34 America/New_York] PHP Notice: Undefined index: 1OO4 in C:\Scripts\charlist.php on line 56
[09-Sep-2017 02:16:34 America/New_York] PHP Notice: Undefined index: 1zxx in C:\Scripts\charlist.php on line 56
That is this part of the script:
if ($current[$charName] !== $level) {
Where $current is an array of all the characters already in the database, I have it populate the array as Name => Level
The characters are in the database but they are not updating due to the error its throwing (as seen above) I tried wrapping $charName in "" but it did not work.
If anyone can provide advice it would be greatly appreciated.
entire script for reference, can see where i've fixed it in here.
<?php
$ClanServer = "";
$SodServer = '';
$UID = "";
$PWD = "";
$file = 'C:\account.txt';
$errlog = ini_get('php_errors');
$ConnInfo = array("UID"=>"$UID", "PWD"=>"$PWD", "CharacterSet" => "UTF-8");
$ClanConn = sqlsrv_connect($ClanServer, $ConnInfo);
$SodConn = sqlsrv_connect($SodServer, $ConnInfo);
if (!$SodConn) {
die('Connection Failed!');
} else {
echo "Connection Successful!<br />".PHP_EOL;
$query = "SELECT * FROM soddb.dbo.levellist";
$result = sqlsrv_query($SodConn, $query, array(), array('Scrollable' => 'buffered'));
$current = array();
$files = array();
while ($row = sqlsrv_fetch_array($result)) {
$name = $row['CharName'];
$current["'".$name."'"] = $row['CharLevel'];
}
$rootDir = realpath('C:/PT-Server/DataServer/userdata/');
$objects = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($rootDir), RecursiveIteratorIterator::SELF_FIRST);
foreach($objects as $name => $object){
if (substr($name, -4) == '.dat') {
$fOpen = fopen($name, "r");
$fRead = fread($fOpen,filesize($name));
/* details */
$charLevel = substr($fRead,0xc8,1);
$charClass = substr($fRead,0xc4,1);
$charName = trim(substr($fRead,0x10,16),"\x00");
$charID = trim(substr($fRead,0x2d0,16),"\x00");
$level = ord($charLevel);
#fclose($fOpen);
$files[] = $charName;
if ($charName == "")
{
unlink($name); // Delete char file with no name...
}
switch (ord($charClass)){
case 1: $class = 'Fighter'; break;
case 2: $class = 'Mechanician'; break;
case 3: $class = 'Archer'; break;
case 4: $class = 'Pikeman'; break;
case 5: $class = 'Atalanta'; break;
case 6: $class = 'Knight'; break;
case 7: $class = 'Magician'; break;
case 8: $class = 'Priestess'; break;
case 9: $class = 'Assassin'; break;
case 10: $class = 'Shaman'; break;
}
if (in_array("'".$charName."'",array_keys($current))) {
if ($current["'".$charName."'"] !== $level) {
$dbentry = "UPDATE soddb.dbo.levellist SET CharLevel='$level',CharClass='$class' WHERE CharName='$charName'";
$clanupdate = "UPDATE clandb.dbo.ul SET ChLv='$level' WHERE ChName='$charName'";
$enter = sqlsrv_query($SodConn, $dbentry);
sqlsrv_query($ClanConn, $clanupdate);
if ($enter) {
echo "Update $charName, $level successful!<br />".PHP_EOL;
}
}
} else {
$dbentry = "INSERT INTO soddb.dbo.Levellist ([ID], [CharName], [CharClass], [CharLevel]) VALUES ('$charID', '$charName', '$class', '$level') ";
$clanupdate = "UPDATE clandb.dbo.ul SET ChLv='$level' WHERE ChName='$charName'";
$enter = sqlsrv_query($SodConn, $dbentry);
sqlsrv_query($ClanConn, $clanupdate);
if ($enter) {
echo "Insert $charName, $level successful!<br />".PHP_EOL;
}
}
}
}
/* Remove deleted characters */
foreach ($current as $k => $v) {
if (!in_array($k, $files)) {
$query = "DELETE FROM soddb.dbo.levellist WHERE CharName='$k'";
sqlsrv_query($SodConn, $query);
}
}
sqlsrv_close($ClanConn);
sqlsrv_close($SodConn);
}
?>

Answer 1

I've worked it out,
where I push the names to the array ($current[$name] = $level;)
I encapsulated that with '' which treats its as a string number a number (where the name was starting with a number)
so its now $current["'".$name."'"] = $level; and i did the same further down
if (in_array("'".$charName."'",array_keys($current))) {
if ($current["'".$charName."'"] !== $level) {
do stuff
}
}
I've now run the script about 15 times to test and its not giving the issue at all.