问题
I would like to alter the output throughout my Codeigniter-based website.
Quite simply I would like to do
$output = str_replace(
array('ā','ē','ī','ō','ū','Ā','Ē','Ī','Ō','Ū'),
array('a','e','i','o','u','A','E','I','O','U'),
$output
)
In the event that the user prefers so.
By reading questions and answers here, I found a link that could help..
https://www.codeigniter.com/user_guide//general/controllers.html#processing-output
..but it only works controller by controller and that would be repetition of content.
Is there a way to make a hook instead?
Thanks in advance!
回答1:
In the application/Libraries file you can make a php file in which you can write something like this:
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Letterconverter {
public function convert($value) {
$before= array('ā','ē','ī','ō','ū','Ā','Ē','Ī','Ō','Ū');
$after =array('a','e','i','o','u','A','E','I','O','U');
$value = str_replace($before, $after, $value);
return $value;
}
}
Then you can call it from wherever you want as a library.
回答2:
Right, so you can write a replace value in an extension of the loader class and save it as MY_Loader.php in application/core. Here is an example:
<?php
class MY_Loader extends CI_Loader
{
public function __construct()
{
parent::__construct();
}
function view($template, $view, $vars = array(), $return = FALSE, $absolute = false)
{
/* This seems inferior, but it's the easiest solution
* if $view is an array then the function is being called with the default CI params, ie:
* $this->load->view('some_view', $data)
*/
if(is_array($view)){
$vars = $view;
$view = $template;
$template = false;
}
if($template == false){
parent::view($view, $vars, $return);
}else{
if($absolute === true)
{
$template_path = 'templates/' . $template . '/' . $view . EXT;
if(!file_exists('application/views/'.$template_path))
{
show_error('The requested absolute view does not exist: ' . $template_path);
}
$template = 'templates/'.$template.'/';
$view_path = false;
}
else
{
$template = 'templates/'.$template.'/';
$template_path = $template . 'template' . EXT;
if(!file_exists('application/views/'.$template_path))
{
show_error('The requested template does not exist: ' . $template_path);
}
$view_path = $template . $view . EXT;
if(!file_exists('application/views/'.$view_path))
{
show_error('The requested view does not exist: ' . $view_path);
}
}
$template_vars = array();
$template_vars['tpl_title'] = 'Title Not Defined';
$template_vars['tpl_meta'] = array();
$template_vars['tpl_link'] = array();
$template_vars['tpl_script'] = array();
$template_vars['tpl_view'] = $view . EXT;
foreach($vars as $key => $val)
{
$template_vars[$key] = $val;
}
//$vars = array_merge($vars, $template_vars);
//include_once($template.'/template_functions' . EXT);
return $this->_ci_load(array('_ci_view' => $template_path, '_ci_vars' => $this->_ci_object_to_array($template_vars), '_ci_return' => $return));
}
}
// --------------------------------------------------------------------
/**
* Loader
*
* This function is used to load views and files.
* Variables are prefixed with _ci_ to avoid symbol collision with
* variables made available to view files
*
* @access private
* @param array
* @return void
*/
function _ci_load($_ci_data)
{
if(substr($_ci_data['_ci_view'], 0, 12) != './templates/'){
parent::_ci_load($_ci_data);
}else{
// Set the default data variables
foreach (array('_ci_view', '_ci_vars', '_ci_path', '_ci_return') as $_ci_val)
{
$$_ci_val = ( ! isset($_ci_data[$_ci_val])) ? FALSE : $_ci_data[$_ci_val];
}
// Set the path to the requested file
if ($_ci_path == '')
{
$_ci_ext = pathinfo($_ci_view, PATHINFO_EXTENSION);
$_ci_file = ($_ci_ext == '') ? $_ci_view.EXT : $_ci_view;
$_ci_path = $_ci_file;
}
else
{
$_ci_x = explode('/', $_ci_path);
$_ci_file = end($_ci_x);
}
if ( ! file_exists($_ci_path))
{
show_error('Unable to load the requested file: '.$_ci_file);
}
// This allows anything loaded using $this->load (views, files, etc.)
// to become accessible from within the Controller and Model functions.
// Only needed when running PHP 5
if ($this->_ci_is_instance())
{
$_ci_CI =& get_instance();
foreach (get_object_vars($_ci_CI) as $_ci_key => $_ci_var)
{
if ( ! isset($this->$_ci_key))
{
$this->$_ci_key =& $_ci_CI->$_ci_key;
}
}
}
/*
* Extract and cache variables
*
* You can either set variables using the dedicated $this->load_vars()
* function or via the second parameter of this function. We'll merge
* the two types and cache them so that views that are embedded within
* other views can have access to these variables.
*/
if (is_array($_ci_vars))
{
$this->_ci_cached_vars = array_merge($this->_ci_cached_vars, $_ci_vars);
}
extract($this->_ci_cached_vars);
/*
* Buffer the output
*
* We buffer the output for two reasons:
* 1. Speed. You get a significant speed boost.
* 2. So that the final rendered template can be
* post-processed by the output class. Why do we
* need post processing? For one thing, in order to
* show the elapsed page load time. Unless we
* can intercept the content right before it's sent to
* the browser and then stop the timer it won't be accurate.
*/
ob_start();
// If the PHP installation does not support short tags we'll
// do a little string replacement, changing the short tags
// to standard PHP echo statements.
$content = file_get_contents($_ci_path);
$content = str_replace(
array('ā','ē','ī','ō','ū','Ā','Ē','Ī','Ō','Ū'),
array('a','e','i','o','u','A','E','I','O','U'),
$content
);
if ((bool) @ini_get('short_open_tag') === FALSE AND config_item('rewrite_short_tags') == TRUE)
{
echo eval('?>'.preg_replace("/;*\s*\?>/", "; ?>", str_replace('<?=', '<?php echo ', '.$content)));
}
else
{
echo eval('?>'.$content.'<?php'); // include() vs include_once() allows for multiple views with the same name
}
log_message('debug', 'File loaded: '.$_ci_path);
// Return the file data if requested
if ($_ci_return === TRUE)
{
$buffer = ob_get_contents();
@ob_end_clean();
return $buffer;
}
/*
* Flush the buffer... or buff the flusher?
*
* In order to permit views to be nested within
* other views, we need to flush the content back out whenever
* we are beyond the first level of output buffering so that
* it can be seen and included properly by the first included
* template and any subsequent ones. Oy!
*
*/
if (ob_get_level() > $this->_ci_ob_level + 1)
{
ob_end_flush();
}
else
{
// PHP 4 requires that we use a global
global $OUT;
$OUT->append_output(ob_get_contents());
@ob_end_clean();
}
}
}
}
You may not need all of this, but I just copied it from an archived projects. Notice in the _ci_load() function you can affect the output before it is evaluated (normally an include as indicated by the comments but changed to string for your case). I have not tested this so it's not intended to be a solution as much as it is a general reminder that you can extend core classes and modify output in one place.
Of course, it might be easier to do in the output class itself: https://www.codeigniter.com/user_guide/libraries/output.html
回答3:
If your intention is to replace accented characters then i suggest you take a look at wordpress remove_accents function here.
2) take a look at codeigniter hooks, there is display_override hook
$hook['display_override'] = array(
'class' => 'MyClass',
'function' => 'Myfunction',
'filename' => 'Myclass.php',
'filepath' => 'hooks',
'params' => array()
);
3) once you define a function/class for this hook, you could get output string there
$this->CI =& get_instance();
$out = $this->CI->output->get_output();
and then you can change the output as you like...
来源：https://stackoverflow.com/questions/25690251/codeigniter-how-to-modify-buffered-output-before-sending