hphp/test/zend/bad/ext-standard-file/fread_variation1.php

   1 <?php
   2 /*
   3  Prototype: string fread ( resource $handle [, int $length] );
   4  Description: reads up to length bytes from the file pointer referenced by handle.
   5    Reading stops when up to length bytes have been read, EOF (end of file) is
   6    reached, (for network streams) when a packet becomes available, or (after
   7    opening userspace stream) when 8192 bytes have been read whichever comes first.
   8 */
   9
  10 /* Read content less than file size &
  11    Read entire file
  12 */
  13
  14 // include the file.inc for common functions for test
  15 include ("file.inc");
  16
  17 /* Function : function check_read(resource $file_handle, int $read_size, int $expect_size)
  18    Description : Read data from file of size $read_size and verifies that $expected_size no. of
  19                  bytes are read.
  20      $file_handle : File Handle
  21      $read_size   : No. of bytes to be read.
  22      $expect_size : Expected data length
  23    Returns: returns the data read
  24 */
  25 function check_read($file_handle, $read_size, $expect_size) {
  26   // print file pointer position before read
  27   var_dump( ftell($file_handle) );
  28   var_dump( feof($file_handle) );
  29
  30   // read the data of size $read_size
  31   echo "Reading $read_size bytes from file, expecting $expect_size bytes ... ";
  32   $data_from_file = fread($file_handle, $read_size);
  33
  34   // check if data read is of expected size
  35   if ( strlen($data_from_file) == $expect_size)
  36     echo "OK\n";
  37   else
  38     echo "Error reading file, total number of bytes read = ".strlen($data_from_file)."\n";
  39
  40   // file pointer position after read
  41   var_dump( ftell($file_handle) );
  42   // check if file pointer at eof()
  43   var_dump( feof($file_handle) );
  44
  45   return $data_from_file;
  46 }
  47
  48 echo "*** Testing fread() : usage variations ***\n";
  49
  50 $file_modes = array("a+","a+b","a+t",
  51                     "w+","w+b","w+t",
  52                     "x+","x+b","x+t");
  53
  54 $file_content_types = array("numeric","text","text_with_new_line", "alphanumeric");
  55
  56 foreach($file_content_types as $file_content_type) {
  57   echo "\n-- Testing fread() with file having content of type ". $file_content_type ." --\n";
  58
  59   /* open the file using $files_modes and perform fread() on it */
  60   foreach($file_modes as $file_mode) {
  61     if(!strstr($file_mode,"x")){
  62        /* create files with $file_content_type */
  63        create_files ( dirname(__FILE__), 1, $file_content_type, 0755, 1, "w", "fread_variation");
  64     }
  65
  66     $filename = dirname(__FILE__)."/fread_variation1.tmp"; // this is name of the file created by create_files()
  67     echo "-- File opened in mode ".$file_mode." --\n";
  68     $file_handle = fopen($filename, $file_mode);
  69     if (!$file_handle) {
  70        echo "Error: failed to fopen() file: $filename!";
  71        exit();
  72     }
  73
  74     if(strstr($file_mode,"w") || strstr($file_mode,"x") ) {
  75       fill_file($file_handle, $file_content_type, 1024);
  76     }
  77
  78     rewind($file_handle);
  79     echo "-- Reading entire file content, expeceted : 1024 bytes --\n";
  80     // read from file, by giving the file actual size,
  81     $data_from_file = check_read($file_handle, 1024, (strstr($file_mode, "+") ? 1024 : 1024 ) );
  82     // calculate the hash and dump it, if data read, expecting here no data was read
  83     if ( $data_from_file != false)
  84       var_dump( md5($data_from_file) );
  85
  86     // reading file by giving less than its size
  87     echo "-- Reading file content less than max. file size, expeceted : 1000 bytes --\n";
  88     rewind($file_handle);
  89     $data_from_file = check_read($file_handle, 1000, (strstr($file_mode, "+") ? 1000 : 1000 ) );
  90     // calculate the hash and dump it, if data read, expecting here no data was read
  91     if ( $data_from_file != false)
  92       var_dump( md5($data_from_file) );
  93
  94     // now close the file
  95     fclose($file_handle);
  96
  97     // delete the file created
  98     delete_file($filename); // delete file
  99   } // end of inner foreach loop
 100 }// end of outer foreach loop
 101
 102 echo"Done\n";
 103 ?>