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php advanced Magic Variables Closures

admin 11月 11, 2020 0

  // Execute the screen specific preprocess function.
  $preprocess_func = 'sample_module_preprocess_screen__' . $screen;
  if (is_callable($preprocess_func)) {
    $preprocess_func($variables);
  }

Magic Variables

These are the magic variables I used a lot in php coding.

Name	Description
__LINE__	Good for debugging with var_dump().
__FILE__	The full path and filename.
__DIR__	The directory of the file.
__FUNCTION__	The function name.

Closures

Closures is the anonymous function in PHP. We can use it in the callback.

$greetings = array_map(function($name) {
  return 'Hello ' . $name;
}, ['John', 'Eric', 'Josh']);

print_r($greetings);