PHP detailed reading and writing of tab-delimited files

This article mainly introduces the implementation of reading and writing tab-divided files in PHP, involving related techniques of reading and writing PHP files and string operations. Friends in need can refer to the following

The example of this article describes the implementation of reading and writing tab-delimited files in PHP. Share it with everyone for your reference. The specific analysis is as follows:

This php code implements reading and writing tab-divided files, including two independent functions, one for reading and one for writing, such as cvs files, etc.

//
// save an array as tab seperated text file
//
function write_tabbed_file($filepath, $array, $save_keys=false){
  $content = '';
  reset($array);
  while(list($key, $val) = each($array)){
    // replace tabs in keys and values to [space]
    $key = str_replace("\t", " ", $key);
    $val = str_replace("\t", " ", $val);
    if ($save_keys){ $content .= $key."\t"; }
    // create line:
    $content .= (is_array($val)) ? implode("\t", $val) : $val;
    $content .= "\n";
  }
  if (file_exists($filepath) && !is_writeable($filepath)){ 
    return false;
  }
  if ($fp = fopen($filepath, 'w+')){
    fwrite($fp, $content);
    fclose($fp);
  }
  else { return false; }
  return true;
}
//
// load a tab seperated text file as array
//
function load_tabbed_file($filepath, $load_keys=false){
  $array = array();
  if (!file_exists($filepath)){ return $array; }
  $content = file($filepath);
  for ($x=0; $x < count($content); $x++){
    if (trim($content[$x]) != &#39;&#39;){
      $line = explode("\t", trim($content[$x]));
      if ($load_keys){
        $key = array_shift($line);
        $array[$key] = $line;
      }
      else { $array[] = $line; }
    }
  }
  return $array;
}
/*
** Example usage:
*/
$array = array(
  &#39;line1&#39; => array(&#39;data-1-1&#39;, &#39;data-1-2&#39;, &#39;data-1-3&#39;),
  &#39;line2&#39; => array(&#39;data-2-1&#39;, &#39;data-2-2&#39;, &#39;data-2-3&#39;),
  &#39;line3&#39; => array(&#39;data-3-1&#39;, &#39;data-3-2&#39;, &#39;data-3-3&#39;),
  &#39;line4&#39; => &#39;foobar&#39;,
  &#39;line5&#39; => &#39;hello world&#39;
);
// save the array to the data.txt file:
write_tabbed_file(&#39;data.txt&#39;, $array, true);
/* the data.txt content looks like this:
line1 data-1-1 data-1-2 data-1-3
line2 data-2-1 data-2-2 data-2-3
line3 data-3-1 data-3-2 data-3-3
line4 foobar
line5 hello world
*/
// load the saved array:
$reloaded_array = load_tabbed_file(&#39;data.txt&#39;,true);
print_r($reloaded_array);
// returns the array from above

The above is the detailed content of PHP detailed reading and writing of tab-delimited files. For more information, please follow other related articles on the PHP Chinese website!