Etiqueta: plugins wordpress

Valencia, 29/08/2026, G.B.
Tal y comenté recientemente en este post, aquí va el plugin de WordPress para frases aleatorias. Os paso también el archivo.php.

Recordad que para subir un plugin a WordPress (que no esté en el repositorio, como es el caso), hay que crear una carpeta con el mismo nombre del archivo .php, comprimirlo en .zip y subirlo por FTP o S FTP (mejor esto último) al apartado del escritorio de WordPress «Subir plugin».

Aquí va e código de la primera versión del plugin. Si no consigues verlo correcatente en este post, descarga el archivo frases-aleatorias.zip de mi cuenta de pCloud e instálalo en WordPRess – > Plugins.

<?php
/**
* Plugin Name: Frases Aleatorias Widget
* Description: Widget, shortcode

Traducir al castellano

Otra frase

y panel de administración para gestionar frases (añadir, editar, eliminar). Cada frase incluye enlace de traducción automática al castellano. Sin dependencias externas.
* Version: 2.0
* Author: Puntocomunica.com
*/

if ( ! defined( ‘ABSPATH’ ) ) {
exit; // Salida directa no permitida.
}

define( ‘FA_TABLA’, ‘fa_frases’ ); // se le añadirá el prefijo de WP al usarla

/* ==========================================================
* INSTALACIÓN: crea la tabla y la rellena con las 50 frases
* la primera vez que se activa el plugin.
* ========================================================== */
function fa_activar_plugin() {
global $wpdb;
$tabla = $wpdb->prefix . FA_TABLA;
$charset_collate = $wpdb->get_charset_collate();

$sql = «CREATE TABLE $tabla (
id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
texto TEXT NOT NULL,
autor VARCHAR(191) NOT NULL,
PRIMARY KEY (id)
) $charset_collate;»;

require_once ABSPATH . ‘wp-admin/includes/upgrade.php’;
dbDelta( $sql );

// Solo se siembran datos si la tabla está vacía (primera instalación)
$total = $wpdb->get_var( «SELECT COUNT(*) FROM $tabla» );
if ( (int) $total === 0 ) {
$frases_iniciales = array(
array( «He who blames others has a long way to go on his journey. He who blames himself is halfway there. He who blames no one has arrived.», «Chinese Proverb» ),
array( «The only way to do great work is to love what you do.», «Steve Jobs» ),
array( «In the middle of difficulty lies opportunity.», «Albert Einstein» ),
array( «It does not matter how slowly you go as long as you do not stop.», «Confucius» ),
array( «Fall seven times, stand up eight.», «Japanese Proverb» ),
array( «The journey of a thousand miles begins with a single step.», «Lao Tzu» ),
array( «Whether you think you can or you think you can’t, you’re right.», «Henry Ford» ),
array( «The best way to predict the future is to create it.», «Abraham Lincoln» ),
array( «Success is not final, failure is not fatal: it is the courage to continue that counts.», «Winston Churchill» ),
array( «Believe you can and you’re halfway there.», «Theodore Roosevelt» ),
array( «Do not go where the path may lead, go instead where there is no path and leave a trail.», «Ralph Waldo Emerson» ),
array( «The mind is everything. What you think you become.», «Buddha» ),
array( «Water which is too pure has no fish.», «Chinese Proverb» ),
array( «A smooth sea never made a skilled sailor.», «African Proverb» ),
array( «He that can have patience can have what he will.», «Benjamin Franklin» ),
array( «You miss 100% of the shots you don’t take.», «Wayne Gretzky» ),
array( «Life is what happens when you’re busy making other plans.», «John Lennon» ),
array( «The only impossible journey is the one you never begin.», «Tony Robbins» ),
array( «Not all those who wander are lost.», «J.R.R. Tolkien» ),
array( «It always seems impossible until it’s done.», «Nelson Mandela» ),
array( «Do what you can, with what you have, where you are.», «Theodore Roosevelt» ),
array( «If you want to go fast, go alone. If you want to go far, go together.», «African Proverb» ),
array( «The best time to plant a tree was 20 years ago. The second best time is now.», «Chinese Proverb» ),
array( «What lies behind us and what lies before us are tiny matters compared to what lies within us.», «Ralph Waldo Emerson» ),
array( «Turn your wounds into wisdom.», «Oprah Winfrey» ),
array( «Knowing yourself is the beginning of all wisdom.», «Aristotle» ),
array( «The unexamined life is not worth living.», «Socrates» ),
array( «He who has a why to live can bear almost any how.», «Friedrich Nietzsche» ),
array( «Out of difficulties grow miracles.», «Jean de La Bruyère» ),
array( «A journey of a thousand miles must begin with a single step.», «Lao Tzu» ),
array( «Even a small star shines in the darkness.», «Finnish Proverb» ),
array( «The bamboo that bends is stronger than the oak that resists.», «Japanese Proverb» ),
array( «Better to light a candle than curse the darkness.», «Chinese Proverb» ),
array( «When the winds of change blow, some build walls, others build windmills.», «Chinese Proverb» ),
array( «Fall down seven times, get up eight.», «Japanese Proverb» ),
array( «One who plants a tree knows they will not sit in its shade.», «Indian Proverb» ),
array( «The nail that sticks out gets hammered down.», «Japanese Proverb» ),
array( «A single arrow is easily broken, but not ten in a bundle.», «Japanese Proverb» ),
array( «He who has never failed has never tried anything new.», «African Proverb» ),
array( «Even the greatest of trees was once a nut who held its ground.», «American Proverb» ),
array( «The river that forgets its source will dry up.», «African Proverb» ),
array( «A bird does not sing because it has an answer, it sings because it has a song.», «Chinese Proverb» ),
array( «Patience is bitter, but its fruit is sweet.», «Aristotle» ),
array( «He who is not courageous enough to take risks will accomplish nothing in life.», «Muhammad Ali» ),
array( «The best preparation for tomorrow is doing your best today.», «H. Jackson Brown Jr.» ),
array( «Success usually comes to those who are too busy to be looking for it.», «Henry David Thoreau» ),
array( «Do not wait for the perfect moment, take the moment and make it perfect.», «Unknown» ),
array( «Great things are done by a series of small things brought together.», «Vincent van Gogh» ),
array( «Perseverance is not a long race; it is many short races one after the other.», «Walter Elliot» ),
array( «You cannot cross the sea merely by standing and staring at the water.», «Rabindranath Tagore» ),
);

foreach ( $frases_iniciales as $f ) {
$wpdb->insert( $tabla, array( ‘texto’ => $f[0], ‘autor’ => $f[1] ) );
}
}
}
register_activation_hook( __FILE__, ‘fa_activar_plugin’ );

/* ==========================================================
* FUNCIONES DE ACCESO A DATOS
* ========================================================== */
function fa_obtener_frases() {
global $wpdb;
$tabla = $wpdb->prefix . FA_TABLA;
return $wpdb->get_results( «SELECT id, texto, autor FROM $tabla ORDER BY id ASC» );
}

function fa_obtener_frases_json() {
$frases = fa_obtener_frases();
$salida = array();
foreach ( $frases as $f ) {
$salida[] = array( ‘texto’ => $f->texto, ‘autor’ => $f->autor );
}
return wp_json_encode( $salida );
}

/* ==========================================================
* RENDERIZADO EN PORTADA (widget y shortcode)
* Incluye enlace de traducción automática al castellano
* (Google Translate), generado por JS según la frase mostrada.
* ========================================================== */
function fa_render_markup_y_script( $instancia_id ) {
ob_start();
?>
<div id=»fa-widget-<?php echo esc_attr( $instancia_id ); ?>» class=»fa-widget» style=»font-family: Georgia, serif; padding: 16px; border-left: 4px solid #444; background: #f9f9f9;»>
<p class=»fa-texto» style=»font-style: italic; font-size: 16px; line-height: 1.5; margin: 0 0 8px 0;»></p>
<p class=»fa-autor» style=»text-align: right; font-weight: bold; margin: 0 0 8px 0;»></p>
<p style=»text-align: right; margin: 0 0 12px 0;»>
<a class=»fa-traducir» href=»#» target=»_blank» rel=»noopener noreferrer» style=»font-size: 13px; text-decoration: underline;»>Traducir al castellano</a>
</p>
<button class=»fa-btn» type=»button» style=»cursor: pointer; padding: 6px 14px; border: none; border-radius: 4px; background: #444; color: #fff; font-size: 14px;»>Otra frase</button>
</div>
<script>
(function() {
var frases = <?php echo fa_obtener_frases_json(); ?>;
var contenedor = document.getElementById(‘fa-widget-<?php echo esc_js( $instancia_id ); ?>’);
if (!contenedor || !frases.length) return;
var elTexto = contenedor.querySelector(‘.fa-texto’);
var elAutor = contenedor.querySelector(‘.fa-autor’);
var elTraducir = contenedor.querySelector(‘.fa-traducir’);
var elBtn = contenedor.querySelector(‘.fa-btn’);

function mostrarFraseAleatoria() {
var indice = Math.floor(Math.random() * frases.length);
var frase = frases[indice];
elTexto.textContent = ‘\u201C’ + frase.texto + ‘\u201D’;
elAutor.textContent = ‘\u2014 ‘ + frase.autor;
elTraducir.href = ‘https://translate.google.com/?sl=en&tl=es&text=’ + encodeURIComponent(frase.texto) + ‘&op=translate’;
}

elBtn.addEventListener(‘click’, mostrarFraseAleatoria);
mostrarFraseAleatoria();
})();
</script>
<?php
return ob_get_clean();
}

function fa_shortcode_frases_aleatorias() {
static $contador = 0;
$contador++;
return fa_render_markup_y_script( ‘sc-‘ . $contador );
}
add_shortcode( ‘frases_aleatorias’, ‘fa_shortcode_frases_aleatorias’ );

class FA_Widget_Frases extends WP_Widget {
public function __construct() {
parent::__construct(
‘fa_widget_frases’,
__( ‘Frase Aleatoria’, ‘frases-aleatorias’ ),
array( ‘description’ => __( ‘Muestra una frase célebre al azar, con enlace de traducción y botón para cambiarla.’, ‘frases-aleatorias’ ) )
);
}

public function widget( $args, $instance ) {
echo $args[‘before_widget’];
if ( ! empty( $instance[‘titulo’] ) ) {
echo $args[‘before_title’] . apply_filters( ‘widget_title’, $instance[‘titulo’] ) . $args[‘after_title’];
}
echo fa_render_markup_y_script( ‘widget-‘ . $this->id );
echo $args[‘after_widget’];
}

public function form( $instance ) {
$titulo = ! empty( $instance[‘titulo’] ) ? $instance[‘titulo’] : __( ‘Frase del día’, ‘frases-aleatorias’ );
?>
<p>
<label for=»<?php echo esc_attr( $this->get_field_id( ‘titulo’ ) ); ?>»><?php _e( ‘Título:’, ‘frases-aleatorias’ ); ?></label>
<input class=»widefat» id=»<?php echo esc_attr( $this->get_field_id( ‘titulo’ ) ); ?>» name=»<?php echo esc_attr( $this->get_field_name( ‘titulo’ ) ); ?>» type=»text» value=»<?php echo esc_attr( $titulo ); ?>»>
</p>
<?php
}

public function update( $new_instance, $old_instance ) {
$instance = array();
$instance[‘titulo’] = ( ! empty( $new_instance[‘titulo’] ) ) ? sanitize_text_field( $new_instance[‘titulo’] ) : »;
return $instance;
}
}
add_action( ‘widgets_init’, function () {
register_widget( ‘FA_Widget_Frases’ );
} );

/* ==========================================================
* PANEL DE ADMINISTRACIÓN: listar, añadir, editar, eliminar
* ========================================================== */
add_action( ‘admin_menu’, function () {
add_menu_page(
‘Frases Aleatorias’,
‘Frases Aleatorias’,
‘manage_options’,
‘fa-frases’,
‘fa_pagina_admin’,
‘dashicons-format-quote’,
58
);
} );

function fa_pagina_admin() {
if ( ! current_user_can( ‘manage_options’ ) ) {
return;
}

global $wpdb;
$tabla = $wpdb->prefix . FA_TABLA;

/* ———- Procesar acciones enviadas por formulario ———- */
if ( isset( $_POST[‘fa_accion’] ) && check_admin_referer( ‘fa_guardar_frase’, ‘fa_nonce’ ) ) {
$texto = isset( $_POST[‘fa_texto’] ) ? sanitize_textarea_field( wp_unslash( $_POST[‘fa_texto’] ) ) : »;
$autor = isset( $_POST[‘fa_autor’] ) ? sanitize_text_field( wp_unslash( $_POST[‘fa_autor’] ) ) : »;

if ( $texto !== » && $autor !== » ) {
if ( $_POST[‘fa_accion’] === ‘crear’ ) {
$wpdb->insert( $tabla, array( ‘texto’ => $texto, ‘autor’ => $autor ) );
echo ‘<div class=»notice notice-success is-dismissible»><p>Frase añadida.</p></div>’;
} elseif ( $_POST[‘fa_accion’] === ‘actualizar’ && ! empty( $_POST[‘fa_id’] ) ) {
$wpdb->update( $tabla, array( ‘texto’ => $texto, ‘autor’ => $autor ), array( ‘id’ => (int) $_POST[‘fa_id’] ) );
echo ‘<div class=»notice notice-success is-dismissible»><p>Frase actualizada.</p></div>’;
}
} else {
echo ‘<div class=»notice notice-error is-dismissible»><p>El texto y el autor no pueden estar vacíos.</p></div>’;
}
}

if ( isset( $_GET[‘fa_eliminar’] ) && check_admin_referer( ‘fa_eliminar_frase’ ) ) {
$wpdb->delete( $tabla, array( ‘id’ => (int) $_GET[‘fa_eliminar’] ) );
echo ‘<div class=»notice notice-success is-dismissible»><p>Frase eliminada.</p></div>’;
}

/* ———- ¿Estamos editando una frase? ———- */
$editando = null;
if ( isset( $_GET[‘fa_editar’] ) ) {
$editando = $wpdb->get_row( $wpdb->prepare( «SELECT * FROM $tabla WHERE id = %d», (int) $_GET[‘fa_editar’] ) );
}

$frases = fa_obtener_frases();
?>
<div class=»wrap»>
<h1>Frases Aleatorias</h1>
<p>Shortcode: <code>

Traducir al castellano

Otra frase

</code> · También disponible como widget en Apariencia → Widgets.</p>

<h2><?php echo $editando ? ‘Editar frase’ : ‘Añadir nueva frase’; ?></h2>
<form method=»post» style=»max-width: 600px;»>
<?php wp_nonce_field( ‘fa_guardar_frase’, ‘fa_nonce’ ); ?>
<input type=»hidden» name=»fa_accion» value=»<?php echo $editando ? ‘actualizar’ : ‘crear’; ?>»>
<?php if ( $editando ) : ?>
<input type=»hidden» name=»fa_id» value=»<?php echo esc_attr( $editando->id ); ?>»>
<?php endif; ?>

<table class=»form-table»>
<tr>
<th><label for=»fa_texto»>Texto (inglés)</label></th>
<td><textarea name=»fa_texto» id=»fa_texto» rows=»3″ class=»large-text» required><?php echo $editando ? esc_textarea( $editando->texto ) : »; ?></textarea></td>
</tr>
<tr>
<th><label for=»fa_autor»>Autor</label></th>
<td><input type=»text» name=»fa_autor» id=»fa_autor» class=»regular-text» required value=»<?php echo $editando ? esc_attr( $editando->autor ) : »; ?>»></td>
</tr>
</table>

<?php submit_button( $editando ? ‘Actualizar frase’ : ‘Añadir frase’ ); ?>
<?php if ( $editando ) : ?>
<a href=»<?php echo esc_url( admin_url( ‘admin.php?page=fa-frases’ ) ); ?>» class=»button»>Cancelar edición</a>
<?php endif; ?>
</form>

<h2>Frases existentes (<?php echo count( $frases ); ?>)</h2>
<table class=»widefat striped»>
<thead>
<tr>
<th style=»width: 55%;»>Texto</th>
<th>Autor</th>
<th style=»width: 160px;»>Acciones</th>
</tr>
</thead>
<tbody>
<?php foreach ( $frases as $f ) : ?>
<tr>
<td><?php echo esc_html( $f->texto ); ?></td>
<td><?php echo esc_html( $f->autor ); ?></td>
<td>
<a href=»<?php echo esc_url( admin_url( ‘admin.php?page=fa-frases&fa_editar=’ . $f->id ) ); ?>»>Editar</a>
|
<a href=»<?php echo esc_url( wp_nonce_url( admin_url( ‘admin.php?page=fa-frases&fa_eliminar=’ . $f->id ), ‘fa_eliminar_frase’ ) ); ?>»
onclick=»return confirm(‘¿Eliminar esta frase?’);» style=»color: #b32d2e;»>Eliminar</a>
|
<a href=»https://translate.google.com/?sl=en&tl=es&text=<?php echo rawurlencode( $f->texto ); ?>&op=translate» target=»_blank» rel=»noopener noreferrer»>Traducir</a>
</td>
</tr>
<?php endforeach; ?>
<?php if ( empty( $frases ) ) : ?>
<tr><td colspan=»3″>Todavía no hay frases.</td></tr>
<?php endif; ?>
</tbody>
</table>
</div>
<?php
}