wamp - Set max file size PHP

I am creating a social site and I am trying to limit the size of the file the user can upload. I already know about changing theupload_max_filesize in the wamp/xamp settings, but is there a way to do it manually ? For e.g. the settings max is 8mb but can I manually set it to 7.5mb or something in the PHP file itself ? This is how I have tried to far :

$file_size = $_FILES['files']['size'];
$maxsize = 1048576;

if($_FILES['files']['size'] > $maxsize) {

    $errors = "Your file is to large";
}
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I also replaced$_FILES['files']['size'] with$file_size. And I also tried:

if ($file_size > 15097152) {

    $errors = 'File cannot be larger than 1MB';
}
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Thank you.

EDIT

<input name="files[]" id='files' accept="image/png,image/gif,image/jpeg" type="file" multiple="multiple" />
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$date_time = date('Y-m-d_H-i-s');
$img_limit = 10;
$maxsize = 3367463;

if(isset($_POST['submit'])) {

    $errors = [];
    $file_name = count($_FILES['files']['name']);
    $file_size = $_FILES['files']['size'];
    
    //$file_type = $_FILES['files']['type'];
    $imageFileType = pathinfo($file_name, PATHINFO_EXTENSION);

    if (strtolower($imageFileType) != "jpeg"&& strtolower($imageFileType) != "jpg" && 
        strtolower($imageFileType) != "png" && strtolower($imageFileType) != "gif") {

        $errors = "File type not allowed.";
    }

    if($_FILES['files']['size'] >= $maxsize) {

        $errors = "Your file is to large";
    }

    if ($img_limit > 10) {

        $errors = 'Cannot upload more than 10 images';
    }
    // Loop through each file
    for( $i=0 ; $i < $file_name ; $i++ ) {

        //Get the temp file path
        $file_tmp = $_FILES['files']['tmp_name'][$i];

        //Make sure we have a file path
        if (!$errors || $file_tmp != "") {

            $picToUpload = $date_time . " -#- " . md5($file_name) . " -#- " . $_FILES['files']['name'][$i];
            $uploadPicture = move_uploaded_file($file_tmp, "uploads/" . $picToUpload);

            $file_path = "uploads/" . $picToUpload;

            $stmt = $con->prepare("INSERT INTO images (image) VALUES (?)");
            $stmt->bind_param('s', $file_path);
            $stmt->execute();
            //$stmt->close();
            header('Location: index4.php');
            exit();
        }
    }
}

$_SESSION['error'] = '<b><p style="color: #000; font-size: 30px; top: 34%;right: 50%;position: absolute;">
' . $errors . '</p></b>';
header('Location: index4.php');
exit();
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