array_push使用数组问题

我正在使用foreach和preg_match收集一些数据，如果preg_math为true，它将把该元素添加到数组$find中，但返回此错误：

PHP警告：array_push（）要求参数1为数组，字符串在upfiles.PHP第324行中给出

$found = array();
    foreach($this->disFunctions as $kkeys => $vvals)
    {            
        if(preg_match('#'.$vvals.'#i', $cFile))
        {                
            array_push($found, $vvals); // LINE 324
        } else {
            $found = ''; 
        }
    } // end foreach
    print_r($found);

编辑：

将array_push值放入我的类：

public final function filterFile(){
    $disabled_functions = ini_get('disable_functions');
    $disFunctionsNoSpace = str_replace(' ', '', $disabled_functions);
    $disFunctions = explode(',', $disFunctionsNoSpace);
    $this->disFunctions = $disFunctions;
    // get file content of the uploaded file (renamed NOT the temporary)
    $cFile = file_get_contents($this->fileDestination, FILE_USE_INCLUDE_PATH);

    $found = array();
    foreach($this->disFunctions as $kkeys => $vvals)
    {            
        if(preg_match('#'.$vvals.'#i', $cFile))
        {                  
            array_push($found, $vvals);
        } 
    } // end foreach
} // end filterFile

$up = new uploadFiles($filename);
$fileterringFile    = $up->filterFile();
print_r($fileterringFile);
var_dump($fileterringFile);

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