El siguiente código redirecciona a una imagen por defecto a cualquier archivo de imagen que no pueda ser encontrado en el servidor.
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^images/.*\.jpg$ /images/default.jpg [L]
Se puede cambiar la extensión ".jpg" por cualquier otra que se este usando.
Esta función convierte las URL y direcciones de correo electrónico dentro de una cadena en hpervículos "clikables".
<?php
function CrearLinks($texto) {
$texto = preg_replace('#(script|about|applet|activex|chrome):#is', "\\1:", $texto);
$texto = ' ' . $texto;
$texto = preg_replace("#(^|[\n ])([\w]+?://[\w\#$%&~/.\-;:=,?@\[\]+]*)#is", "\\1<a href=\"\\2\" target=\"_blank\">\\2</a>", $texto);
$texto = preg_replace("#(^|[\n ])((www|ftp)\.[\w\#$%&~/.\-;:=,?@\[\]+]*)#is", "\\1<a href=\"http://\\2\" target=\"_blank\">\\2</a>", $texto);
$texto = preg_replace("#(^|[\n ])([a-z0-9&\-_.]+?)@([\w\-]+\.([\w\-\.]+\.)*[\w]+)#i", "\\1<a href=\"mailto:\\2@\\3\">\\2@\\3</a>", $texto);
$texto = substr($texto, 1);
return $texto;
}
$cadena ="Lorem ipsum www.google.es. Qui, webintenta@gmail.com repren.";
echo CrearLinks($cadena);
?>
Visto en How To Make Clickable Text URL Links From Text Links Change To Clicking » »
Simplemente se ha de pegar el siguiente código en la parte de tu tema donde los quieras mostrar. El ejemplo muestra los últimos 10 comentarios. Para variar este valor tan sólo deberemos modificarlo en: "...ORDER BY comment_date_gmt DESC LIMIT 10".
<?php
global $wpdb;
$sql = "SELECT DISTINCT ID, post_title, post_password, comment_ID, comment_post_ID, comment_author, comment_date_gmt, comment_approved, comment_type,comment_author_url, SUBSTRING(comment_content,1,30) AS com_excerpt FROM $wpdb->comments LEFT OUTER JOIN $wpdb->posts ON ($wpdb->comments.comment_post_ID = $wpdb->posts.ID) WHERE comment_approved = '1' AND comment_type = '' AND post_password = '' ORDER BY comment_date_gmt DESC LIMIT 10";
$comments = $wpdb->get_results($sql);
$output = $pre_HTML;
$output .= "\n<ul>";
foreach ($comments as $comment) {
$output .= "\n<li>".strip_tags($comment->comment_author) .":" . "<a href=\"" . get_permalink($comment->ID)."#comment-" . $comment->comment_ID . "\" title=\"on ".$comment->post_title . "\">" . strip_tags($comment->com_excerpt)."</a></li>";
}
$output .= "\n</ul>";
$output .= $post_HTML;
echo $output;
?>
Interesante clase para acceder de un modo sencillo al servicio metereológico de Google.
Ejemplo:
<?php
class GoogleWeatherAPI {
private $city_code = '';
private $city = '';
private $domain = 'www.google.com';
private $prefix_images = '';
private $current_conditions = array();
private $forecast_conditions = array();
private $is_found = true;
/**
* Class constructor
* @param $city_code is the label of the city
* @param $lang the lang of the return weather labels
* @return ...
*/
function __construct ($city_code,$lang='fr') {
$this->city_code = $city_code;
$this->prefix_images = 'http://'.$this->domain;
$this->url = 'http://'.$this->domain.'/ig/api?weather='.urlencode($this->city_code).'&hl='.$lang;
$content = utf8_encode(file_get_contents($this->url));
$xml = simplexml_load_string($content);
if(!isset($xml->weather->problem_cause)) {
$xml = simplexml_load_string($content);
$this->city = (string)$xml->weather->forecast_information->city->attributes()->data;
$this->current_conditions['condition'] = (string)$xml->weather->current_conditions->condition->attributes()->data;
$this->current_conditions['temp_f'] = (string)$xml->weather->current_conditions->temp_f->attributes()->data;
$this->current_conditions['temp_c'] = (string)$xml->weather->current_conditions->temp_c->attributes()->data;
$this->current_conditions['humidity'] = (string)$xml->weather->current_conditions->humidity->attributes()->data;
$this->current_conditions['icon'] = $this->prefix_images.(string)$xml->weather->current_conditions->icon->attributes()->data;
$this->current_conditions['wind_condition'] = (string)$xml->weather->current_conditions->wind_condition->attributes()->data;
foreach($xml->weather->forecast_conditions as $this->forecast_conditions_value) {
$this->forecast_conditions_temp = array();
$this->forecast_conditions_temp['day_of_week'] = (string)$this->forecast_conditions_value->day_of_week->attributes()->data;
$this->forecast_conditions_temp['low'] = (string)$this->forecast_conditions_value->low->attributes()->data;
$this->forecast_conditions_temp['high'] = (string)$this->forecast_conditions_value->high->attributes()->data;
$this->forecast_conditions_temp['icon'] = $this->prefix_images.(string)$this->forecast_conditions_value->icon->attributes()->data;
$this->forecast_conditions_temp['condition'] = (string)$this->forecast_conditions_value->condition->attributes()->data;
$this->forecast_conditions []= $this->forecast_conditions_temp;
}
} else {
$this->is_found = false;
}
}
function getCity() {
return $this->city;
}
function getCurrent() {
return $this->current_conditions;
}
function getForecast() {
return $this->forecast_conditions;
}
function isFound() {
return $this->is_found;
}
}
$gweather = new GoogleWeatherAPI('valencia','es');
if($gweather->isFound()) {
echo '<pre>'; print_r($gweather->getCity()); echo '</pre>';
echo '<pre>'; print_r($gweather->getCurrent()); echo '</pre>';
echo '<pre>'; print_r($gweather->getForecast()); echo '</pre>';
}
?>
Existen varias técnicas que usan PHP para optimizar los ficheros CSS y reducir el número de peticiones HTTP en el caso de que dispongamos de varios. La siguiente técnica es una variación de la de Reinhold Weber. Los CSS son incluidos pero no son eliminados los espacios en blancos, lo que facilita la depuración y el acceso al contenido mediante herramientas como Firebug.
<?php
if(extension_loaded('zlib')){
ob_start('ob_gzhandler');
}
header ("content-type: text/css; charset: UTF-8");
header ("cache-control: must-revalidate");
$offset = 60 * 60;
$expire = "expires: " . gmdate ("D, d M Y H:i:s", time() + $offset) . " GMT";
header ($expire);
ob_start("compress");
function compress($buffer) {
// remove comments
$buffer = preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/!', '', $buffer);
return $buffer;
}
// list CSS files to be included
include('baseline.css');
include('styles.css');
if(extension_loaded('zlib')){
ob_end_flush();
}
?>