PHP for循环意外（T_VARIABLE），期待＆＃39 ;;＆＃39;

Question

我尝试编写常规循环，但到目前为止我尝试过的所有解决方案都会产生错误。

这两种：

$length = count($fileList);

for ($index = 0; $index < $length; $index++) {

和

for ($index = 0, $length = count($fileList); $index <= $length; $index++) {

生成以下错误（在编译时）：

Parse error: syntax error, unexpected '$length' (T_VARIABLE), expecting ';' in C:\xampp\htdocs\PC_administration_interface\Controler\Interface_builder\html\html_data_importer.php on line 590

如果我试试这个：

for ($index = 0; $index < count($fileList); $index++) {

然后，我收到此错误（在运行时）：

Fatal error: Call to undefined function  count() in C:\xampp\htdocs\PC_administration_interface\Controler\Interface_builder\html\html_data_importer.php on line 590

即便如此：

for ($index = 0; $index < 1; $index++) {

给我以下错误（在运行时）：

Use of undefined constant  1 - assumed ' 1'

到目前为止，这是完整的背景：

    /**
* In $fileList, validate the files (name and extension) and save the files related to the import.
* If a file already exists for a specific import, it will be replaced by the new one.
*
* @param $errorMessage String to return the error message.
* @param $fileList Array containing the files to upload. Use $_FILES[] and send the array of the upload button.
* @param $dataSource Int Use DataSupport class constant
* @param $cleanList Boolean clean the current list.
*/
public function saveSourceFileList(&$errorMessage, array $fileList, $dataSource, $cleanList = false){

    $errorMessage = "";

    $fileArray = array();

    $invalidArray = array();

    $path = realpath(dirname(__FILE__)) . '/../../Backup/';


    if (!empty($fileList)){

        $length = count($fileList);

        for ($index = 0; $index < $length; $index++) {

            if ($this->importer->isFileToImportValid($fileList['name'][$index], $dataSource)){

                $name = substr_replace($fileList['name'][$index], date("Ymd_His"), (strpos($fileList['name'][$index], ".")), 0);

                echo $name;

                $fileArray[] = "";
            }
            else{

                $invalidArray[] = $fileList['name'][$index];    
            }

        }


    }

}