如何从php函数中访问全局变量?


How do I access a global variable from in a php function?

我看了堆栈溢出流的讨论,不能访问全局变量内部的函数。

它解决了这个问题。但我无法让代码工作。我试图访问$batch_fl_str和$batch_str从函数ConvertCsvFile,但我不能访问这两个变量。

有什么建议吗?下面是我的代码:

$today = date(ymd);
$curr_time = date(Hi);
$local_time = localtime();
$curr_min = str_pad($local_time[1], 2, '0', STR_PAD_LEFT);
$curr_hr = str_pad($local_time[2], 2, '0', STR_PAD_LEFT);
$batch_fl_str = "-" . $today . "-" . $curr_hr . $curr_min;
$batch_str = $today . "-" . $curr_hr . $curr_min ;

function ConvertCsvFile($input_path, $input_file, $input_hist_path, $hdl_output_fl, $hdl_out_hist_fl) {
//  Define static variable
    global $batch_fl_str;
    global $batch_str;
    static $fl_no = 0;        //NOTE: static variable 
    $fl_no++;
    $fl_no_str = str_pad($fl_no, 3, 0, STR_PAD_LEFT);
    $batch_fl_id = $batch_fl_str . "-" . $fl_no_str . "." ;
    $batch_id = $batch_str . "-" . $fl_no_str . "-";
    echo "Batch fl str  = $batch_fl_str 'n";
    echo "Batch str     = $batch_str 'n";
    echo "Batch file id = $batch_fl_id 'n";
    echo "Batch id      = $batch_id 'n";

}

当上面的程序运行时,我收到以下输出:

Converting the file:  DOC#9553814.CSV
Batch fl str  = -130511-0316
Batch str     = 130511-0316
Batch fl str  =
Batch str     =
Batch file id = -001.
Batch id      = -001-

您也可以使用$GLOBALS数组访问全局变量。

例如

      $foo = 'Hello World!';
      function Hello() {
          echo $GLOBALS['foo'];
      } 

在你的代码中,测试一下这些值是否在函数外部的变量中设置了。也许变量值没有被正确地赋值。

相关文章: