Php Xml数据不能通过json编码_Php_Xml_Json

Php Xml数据不能通过json编码

php xml json

Php Xml数据不能通过json编码,php,xml,json,Php,Xml,Json,打印（$data）发出 $drivetracker = simplexml_load_file('geot_5980.xml'); $currentDrive = "init"; $save = 0; $drive = 0; $break = 0; $display = 0; $changeDrive = 0; $endhalf = 0; $data = array(); $driveArr = array();

打印（$data）发出

    $drivetracker = simplexml_load_file('geot_5980.xml');
    $currentDrive = "init";
    $save = 0;
    $drive = 0;
    $break = 0;
    $display = 0;
    $changeDrive = 0;
    $endhalf = 0;
    $data = array();
    $driveArr = array();

    foreach ($drivetracker->plays->qtr as $qtr):
        foreach ($qtr->play as $myplay):
        $hasball = (string)$myplay['hasball'];
            $play = (string)$myplay['spot'];
            $down = (string)$myplay['down'];
        $togo = (string)$myplay['togo'];
        $type = (string)$myplay['type'];
        $text = (string)$myplay['text'];

            $hasball = mb_convert_encoding($hasball, 'UTF-8');
            $play = mb_convert_encoding($play, 'UTF-8');
            $down = mb_convert_encoding($down, 'UTF-8');
            $togo = mb_convert_encoding($togo, 'UTF-8');
            $type = mb_convert_encoding($type, 'UTF-8');
            $text = mb_convert_encoding($text, 'UTF-8');

        if ($save == 0 && strpos($text, 'start') !== FALSE){
        $save = 1;
        $break = 1;
        } else if ($save == 1 && strpos($text, 'start') !== FALSE) {
        $break = 1;
        } else if ($save == 1 && strpos($text, 'Start') !== FALSE) {
        $break = 1;
        } else if ($save == 1 && strpos($text, 'ball') !== FALSE) {
        $break = 1;
        } else if ($save == 1 && strpos($text, 'Timeout') !== FALSE) {
        $break = 1;
        } else if ($save == 1 && strpos($text, 'and') !== FALSE) {
        $break = 1;
        }

        //ignore all plays when save is false
        if($save == 0){$break = 1;}

        if($break == 0){
        //drive check
        if (strpos($currentDrive, 'init') !== FALSE){        
            $currentDrive = $hasball;
            $drive += 1;
        } else if ($currentDrive != $hasball){  
            $currentDrive = $hasball;
            $drive += 1;
            $display = 1;
        } else if (strpos($text, 'End of half') !== FALSE) { // end of half or game so new drive
            $endhalf = 1;
        }

                if($drive == $driveid){
                    array_push($data, array("text" => $text,                
                    "spot" => $play,
                    "ball" => $hasball,
                    "togo" => $togo,
                    "type" => $type,
                    "drive"=> $drive)
               );
                }

        if($endhalf == 1) {
            $drive += 1;
        }
        }

        //resetter after each iteration
        $break = 0;
        $display = 0;
        $endhalf = 0;
        endforeach;
    endforeach;
    print_r($data);
    echo json_encode($data);

json_encode（$data）提供空白

有人知道为什么这个由xml信息组成的php数组不能通过json编码吗？

您是否启用了错误报告？xml文件编码？