public static function tempnam($dir, $prefix) {
    // Force $dir into a VFS temp path if it's not already one.
    $temp_root = static::sys_get_temp_dir();
    if (!StringUtil::startsWith($dir, $temp_root)) {
      $dir = $temp_root . '/' . str_replace('\\', '/', $dir);
    }

    // Create all intermediate directories if needed.
    @mkdir($dir, 0777, true);

    // Generate a unique non-existing file name.
    for ($retry = 0; $retry < 10 || file_exists($filename); $retry++) {
      $filename = $dir . '/' . uniqid($prefix, true);
    }
    if (file_exists($filename)) {
      trigger_error('Fail to generate a unique name for the temporary file',
                    E_USER_ERROR);
      return false;
    }

    // tempnam requires the file to be created with permission set to 0600.
    if (touch($filename) === false ||
        chmod($filename, static::DEFAULT_TMPFILE_MODE) === false) {
      trigger_error('Fail to create and change permission of temporary file ' .
                    $filename, E_USER_ERROR);
      return false;
    }

    return $filename;
  }
public static function tempnam($dir, $prefix) {
    // Force $dir into a VFS temp path if it's not already one.
    $temp_root = static::sys_get_temp_dir();
    if (!StringUtil::startsWith($dir, $temp_root)) {
      $dir = $temp_root . '/' . str_replace('\\', '/', $dir);
    }

    // Create all intermediate directories if needed.
    @mkdir($dir, 0777, true);

    // Generate a unique non-existing file name.
    for ($retry = 0; $retry < 10 || file_exists($filename); $retry++) {
      $filename = $dir . '/' . uniqid($prefix, true);
    }
    if (file_exists($filename)) {
      trigger_error('Fail to generate a unique name for the temporary file',
                    E_USER_ERROR);
      return false;
    }

    // tempnam requires the file to be created with permission set to 0600.
    if (touch($filename) === false ||
        chmod($filename, static::DEFAULT_TMPFILE_MODE) === false) {
      trigger_error('Fail to create and change permission of temporary file ' .
                    $filename, E_USER_ERROR);
      return false;
    }

    return $filename;
  }
public static function tempnam ( $ dir , $ prefix ) { // Force $dir into a VFS temp path if it's not already one. $ temp_root = static :: sys_get_temp_dir ( ) ; if ( ! StringUtil :: startsWith ( $ dir , $ temp_root ) ) { $ dir = $ temp_root . '/' . str_replace ( '\\' , '/' , $ dir ) ; } // Create all intermediate directories if needed. @ mkdir ( $ dir , 0777 , true ) ; // Generate a unique non-existing file name. for ( $ retry = 0 ; $ retry < 10 || file_exists ( $ filename ) ; $ retry ++ ) { $ filename = $ dir . '/' . uniqid ( $ prefix , true ) ; } if ( file_exists ( $ filename ) ) { trigger_error ( 'Fail to generate a unique name for the temporary file' , E_USER_ERROR ) ; return false ; } // tempnam requires the file to be created with permission set to 0600. if ( touch ( $ filename ) === false || chmod ( $ filename , static :: DEFAULT_TMPFILE_MODE ) === false ) { trigger_error ( 'Fail to create and change permission of temporary file ' . $ filename , E_USER_ERROR ) ; return false ; } return $ filename ; }
Create file with unique file name.

@param string $dir
The directory where the temporary filename will be created.
@param string $prefix
The prefix of the generated temporary filename.
@return bool|string
a string with the new temporary file name on success, otherwise FALSE.

@see http://php.net/manual/en/function.tempnam.php
Create file with unique file name .