simple_calendrier/balise/simplecal_dates.php

<?php
/**
 * Plugin Simple Calendrier v2 pour SPIP 3
 * Licence GNU/GPL
 * 2010-2016
 *
 * cf. paquet.xml pour plus d'infos.
 */

if (!defined("_ECRIRE_INC_VERSION")) return;

function balise_DATE_JOUR($p) { 
	$date_now = date('Y-m-d H:i:s');
	
	$p->code = "'$date_now'"; 
	return $p; 
}

function balise_DATE_PREMIER_DU_MOIS($p) { 
	$date = date('Y-m-01');
	$p->code = "'$date'"; 
	return $p; 
}

function balise_DATE_DERNIER_DU_MOIS($p) { 
	$date = date('Y-m-31');
	$p->code = "'$date'"; 
	return $p; 
}

function balise_DATE_JOUR_PLUS($p) { 
	$date_now = date('Y-m-d H:i:s');
	
	$jour = jour($date_now);
	$mois = mois($date_now);
	$annee = annee($date_now);
	$heure = 0;
	$minute = 0;
	$seconde = 0;
		
	$nb_jour = intval($p->param[0][1][0]->texte);
	$date_plus = date("Y-m-d", mktime($heure, $minute, $seconde, $mois, $jour+$nb_jour, $annee));

	$p->code = "'$date_plus'"; return $p; 
}

function balise_DATE_JOUR_MOINS($p) { 
	$date_now = date('Y-m-d H:i:s');
	
	$jour = jour($date_now);
	$mois = mois($date_now);
	$annee = annee($date_now);
	$heure = 0;
	$minute = 0;
	$seconde = 0;
		
	$nb_jour = intval($p->param[0][1][0]->texte);
	$date_plus = date("Y-m-d", mktime($heure, $minute, $seconde, $mois, $jour-$nb_jour, $annee));
	
	$p->code = "'$date_plus'"; return $p; 
}