{"id":2591,"date":"2012-04-23T13:45:59","date_gmt":"2012-04-23T13:45:59","guid":{"rendered":"https:\/\/www.jose-aguilar.com\/blog\/?p=2591"},"modified":"2012-08-30T18:55:44","modified_gmt":"2012-08-30T18:55:44","slug":"comparar-fechas-con-php","status":"publish","type":"post","link":"https:\/\/www.jose-aguilar.com\/blog\/comparar-fechas-con-php\/","title":{"rendered":"Comparar dos fechas con php"},"content":{"rendered":"<p><a href=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/04\/source-php-icon1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-4510\" title=\"source-php-icon\" src=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/04\/source-php-icon1.png\" alt=\"\" width=\"128\" height=\"128\" srcset=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/04\/source-php-icon1.png 128w, https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/04\/source-php-icon1-80x80.png 80w\" sizes=\"auto, (max-width: 128px) 100vw, 128px\" \/><\/a>La forma m\u00e1s sencilla de comparar dos fechas es utilizando la funci\u00f3n de PHP strtotime que convierte una fecha escrita en una cadena correctamente formateada a un UNIX timestamp, que es como estos sistemas operativos interpretan las fechas (en segundos). Utilizar esta funci\u00f3n conlleva un serio problema que veremos m\u00e1s abajo.<\/p>\n<pre>&lt;?php\r\n$fecha_actual = strtotime(date(\"d-m-Y H:i:00\",time()));\r\n$fecha_entrada = strtotime(\"19-11-2008 21:00:00\");\r\n\r\nif($fecha_actual &gt; $fecha_entrada){\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 echo \"La fecha entrada ya ha pasado\";\r\n}else{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 echo \"Aun falta algun tiempo\";\r\n}\r\n?&gt;<\/pre>\n<p>El problema de trabajar con marcas de tiempo Unix es que el rango de fechas posibles termina sobre el a\u00f1o 2030, es decir que a partir de ese a\u00f1o, como no hay m\u00e1s d\u00edgitos para representar una cifra superior se reiniciar\u00e1 a 0 (equivalente al a\u00f1o 1970 aproximadamente). Aunque falte mucho tiempo, es una mala pr\u00e1ctica emplear este tipo de factores.<\/p>\n<p>Para comprar 2 fechas correctamente lo que podemos hacer es crear una funci\u00f3n que recibe 2 fechas retornando los d\u00edas que falta para que sean iguales.<\/p>\n<pre>&lt;?php\r\nfunction compararFechas($primera, $segunda)\r\n\u00a0{\r\n\u00a0 $valoresPrimera = explode (\"\/\", $primera);\u00a0 \u00a0\r\n\u00a0 $valoresSegunda = explode (\"\/\", $segunda); \r\n\r\n\u00a0 $diaPrimera\u00a0\u00a0\u00a0 = $valoresPrimera[0]; \u00a0\r\n\u00a0 $mesPrimera\u00a0 = $valoresPrimera[1]; \u00a0\r\n\u00a0 $anyoPrimera\u00a0\u00a0 = $valoresPrimera[2]; \r\n\r\n\u00a0 $diaSegunda\u00a0\u00a0 = $valoresSegunda[0]; \u00a0\r\n\u00a0 $mesSegunda = $valoresSegunda[1]; \u00a0\r\n\u00a0 $anyoSegunda\u00a0 = $valoresSegunda[2];\r\n\r\n\u00a0 $diasPrimeraJuliano = gregoriantojd($mesPrimera, $diaPrimera, $anyoPrimera); \u00a0\r\n\u00a0 $diasSegundaJuliano = gregoriantojd($mesSegunda, $diaSegunda, $anyoSegunda);\u00a0\u00a0\u00a0 \u00a0\r\n\r\n\u00a0 if(!checkdate($mesPrimera, $diaPrimera, $anyoPrimera)){\r\n\u00a0\u00a0\u00a0 \/\/ \"La fecha \".$primera.\" no es v&amp;aacute;lida\";\r\n\u00a0\u00a0\u00a0 return 0;\r\n\u00a0 }elseif(!checkdate($mesSegunda, $diaSegunda, $anyoSegunda)){\r\n\u00a0\u00a0\u00a0 \/\/ \"La fecha \".$segunda.\" no es v&amp;aacute;lida\";\r\n\u00a0\u00a0\u00a0 return 0;\r\n\u00a0 }else{\r\n\u00a0\u00a0\u00a0 return\u00a0 $diasPrimeraJuliano - $diasSegundaJuliano;\r\n\u00a0 } \r\n\r\n}\r\n?&gt;<\/pre>\n<p>Y su ejecuci\u00f3n de ejemplo:<\/p>\n<pre>$primera = \"29\/02\/2000\";\r\n$segunda = \"31\/01\/2000\";\r\n\r\necho '&lt;p&gt;Fecha 1: '.$primera.'&lt;\/p&gt;';\r\necho '&lt;p&gt;Fecha 2: '.$segunda.'&lt;\/p&gt;';\r\n\r\necho 'Diferencia en dias: '.compararFechas ($primera,$segunda);<\/pre>\n<p><a href=\"https:\/\/www.jose-aguilar.com\/scripts\/php\/compara-fechas\/\">Ver ejemplo en funcionamiento<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>La forma m\u00e1s sencilla de comparar dos fechas es utilizando la funci\u00f3n de PHP strtotime que convierte una fecha escrita en una cadena correctamente formateada a un UNIX timestamp, que es como estos sistemas operativos interpretan las fechas (en segundos). Utilizar esta funci\u00f3n conlleva un serio problema que veremos m\u00e1s abajo. &lt;?php $fecha_actual = strtotime(date(\u00abd-m-Y [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4510,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[113],"class_list":["post-2591","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-php","tag-fechas"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Comparar dos fechas con php - Jose Aguilar Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Comparar dos fechas con php - Jose Aguilar Blog\" \/>\n<meta property=\"og:description\" content=\"La forma m\u00e1s sencilla de comparar dos fechas es utilizando la funci\u00f3n de PHP strtotime que convierte una fecha escrita en una cadena correctamente formateada a un UNIX timestamp, que es como estos sistemas operativos interpretan las fechas (en segundos). Utilizar esta funci\u00f3n conlleva un serio problema que veremos m\u00e1s abajo. &lt;?php $fecha_actual = strtotime(date(&quot;d-m-Y [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.jose-aguilar.com\/blog\/comparar-fechas-con-php\/\" \/>\n<meta property=\"og:site_name\" content=\"Jose Aguilar Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/joseaguilarblog\" \/>\n<meta property=\"article:published_time\" content=\"2012-04-23T13:45:59+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2012-08-30T18:55:44+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/04\/source-php-icon1.png\" \/>\n\t<meta property=\"og:image:width\" content=\"128\" \/>\n\t<meta property=\"og:image:height\" content=\"128\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Jose Aguilar\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@JoseAguilarBlog\" \/>\n<meta name=\"twitter:site\" content=\"@JoseAguilarBlog\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"Jose Aguilar\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tiempo de lectura\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minuto\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/comparar-fechas-con-php\/\",\"url\":\"https:\/\/www.jose-aguilar.com\/blog\/comparar-fechas-con-php\/\",\"name\":\"Comparar dos fechas con php - Jose Aguilar Blog\",\"isPartOf\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/comparar-fechas-con-php\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/comparar-fechas-con-php\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/04\/source-php-icon1.png\",\"datePublished\":\"2012-04-23T13:45:59+00:00\",\"dateModified\":\"2012-08-30T18:55:44+00:00\",\"author\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/#\/schema\/person\/e6d485db1e1140866e95971d17105d11\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/comparar-fechas-con-php\/#breadcrumb\"},\"inLanguage\":\"es\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.jose-aguilar.com\/blog\/comparar-fechas-con-php\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"es\",\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/comparar-fechas-con-php\/#primaryimage\",\"url\":\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/04\/source-php-icon1.png\",\"contentUrl\":\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/04\/source-php-icon1.png\",\"width\":128,\"height\":128},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/comparar-fechas-con-php\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Portada\",\"item\":\"https:\/\/www.jose-aguilar.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Comparar dos fechas con php\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/#website\",\"url\":\"https:\/\/www.jose-aguilar.com\/blog\/\",\"name\":\"Jose Aguilar Blog\",\"description\":\"Desarrollo Web con PrestaShop, WordPress, PHP, jQuery y Ajax\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.jose-aguilar.com\/blog\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"es\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/#\/schema\/person\/e6d485db1e1140866e95971d17105d11\",\"name\":\"Jose Aguilar\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"es\",\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/abbfef5f1d75260c549d0f2c2842bb697ba1aadff3b2836b39d2590c8a625415?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/abbfef5f1d75260c549d0f2c2842bb697ba1aadff3b2836b39d2590c8a625415?s=96&d=mm&r=g\",\"caption\":\"Jose Aguilar\"},\"description\":\"Director ejecutivo y tecnol\u00f3gico en JA Modules. Experto programador PrestaShop y Experto programador WordPress.\",\"sameAs\":[\"https:\/\/plus.google.com\/114357189801512615537\"],\"url\":\"https:\/\/www.jose-aguilar.com\/blog\/author\/josea902\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Comparar dos fechas con php - Jose Aguilar Blog","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"og_locale":"es_ES","og_type":"article","og_title":"Comparar dos fechas con php - Jose Aguilar Blog","og_description":"La forma m\u00e1s sencilla de comparar dos fechas es utilizando la funci\u00f3n de PHP strtotime que convierte una fecha escrita en una cadena correctamente formateada a un UNIX timestamp, que es como estos sistemas operativos interpretan las fechas (en segundos). Utilizar esta funci\u00f3n conlleva un serio problema que veremos m\u00e1s abajo. &lt;?php $fecha_actual = strtotime(date(\"d-m-Y [&hellip;]","og_url":"https:\/\/www.jose-aguilar.com\/blog\/comparar-fechas-con-php\/","og_site_name":"Jose Aguilar Blog","article_publisher":"https:\/\/www.facebook.com\/joseaguilarblog","article_published_time":"2012-04-23T13:45:59+00:00","article_modified_time":"2012-08-30T18:55:44+00:00","og_image":[{"width":128,"height":128,"url":"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/04\/source-php-icon1.png","type":"image\/png"}],"author":"Jose Aguilar","twitter_card":"summary_large_image","twitter_creator":"@JoseAguilarBlog","twitter_site":"@JoseAguilarBlog","twitter_misc":{"Escrito por":"Jose Aguilar","Tiempo de lectura":"1 minuto"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.jose-aguilar.com\/blog\/comparar-fechas-con-php\/","url":"https:\/\/www.jose-aguilar.com\/blog\/comparar-fechas-con-php\/","name":"Comparar dos fechas con php - Jose Aguilar Blog","isPartOf":{"@id":"https:\/\/www.jose-aguilar.com\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.jose-aguilar.com\/blog\/comparar-fechas-con-php\/#primaryimage"},"image":{"@id":"https:\/\/www.jose-aguilar.com\/blog\/comparar-fechas-con-php\/#primaryimage"},"thumbnailUrl":"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/04\/source-php-icon1.png","datePublished":"2012-04-23T13:45:59+00:00","dateModified":"2012-08-30T18:55:44+00:00","author":{"@id":"https:\/\/www.jose-aguilar.com\/blog\/#\/schema\/person\/e6d485db1e1140866e95971d17105d11"},"breadcrumb":{"@id":"https:\/\/www.jose-aguilar.com\/blog\/comparar-fechas-con-php\/#breadcrumb"},"inLanguage":"es","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.jose-aguilar.com\/blog\/comparar-fechas-con-php\/"]}]},{"@type":"ImageObject","inLanguage":"es","@id":"https:\/\/www.jose-aguilar.com\/blog\/comparar-fechas-con-php\/#primaryimage","url":"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/04\/source-php-icon1.png","contentUrl":"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/04\/source-php-icon1.png","width":128,"height":128},{"@type":"BreadcrumbList","@id":"https:\/\/www.jose-aguilar.com\/blog\/comparar-fechas-con-php\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Portada","item":"https:\/\/www.jose-aguilar.com\/blog\/"},{"@type":"ListItem","position":2,"name":"Comparar dos fechas con php"}]},{"@type":"WebSite","@id":"https:\/\/www.jose-aguilar.com\/blog\/#website","url":"https:\/\/www.jose-aguilar.com\/blog\/","name":"Jose Aguilar Blog","description":"Desarrollo Web con PrestaShop, WordPress, PHP, jQuery y Ajax","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.jose-aguilar.com\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"es"},{"@type":"Person","@id":"https:\/\/www.jose-aguilar.com\/blog\/#\/schema\/person\/e6d485db1e1140866e95971d17105d11","name":"Jose Aguilar","image":{"@type":"ImageObject","inLanguage":"es","@id":"https:\/\/www.jose-aguilar.com\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/abbfef5f1d75260c549d0f2c2842bb697ba1aadff3b2836b39d2590c8a625415?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/abbfef5f1d75260c549d0f2c2842bb697ba1aadff3b2836b39d2590c8a625415?s=96&d=mm&r=g","caption":"Jose Aguilar"},"description":"Director ejecutivo y tecnol\u00f3gico en JA Modules. Experto programador PrestaShop y Experto programador WordPress.","sameAs":["https:\/\/plus.google.com\/114357189801512615537"],"url":"https:\/\/www.jose-aguilar.com\/blog\/author\/josea902\/"}]}},"_links":{"self":[{"href":"https:\/\/www.jose-aguilar.com\/blog\/wp-json\/wp\/v2\/posts\/2591","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jose-aguilar.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.jose-aguilar.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.jose-aguilar.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.jose-aguilar.com\/blog\/wp-json\/wp\/v2\/comments?post=2591"}],"version-history":[{"count":0,"href":"https:\/\/www.jose-aguilar.com\/blog\/wp-json\/wp\/v2\/posts\/2591\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jose-aguilar.com\/blog\/wp-json\/wp\/v2\/media\/4510"}],"wp:attachment":[{"href":"https:\/\/www.jose-aguilar.com\/blog\/wp-json\/wp\/v2\/media?parent=2591"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.jose-aguilar.com\/blog\/wp-json\/wp\/v2\/categories?post=2591"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.jose-aguilar.com\/blog\/wp-json\/wp\/v2\/tags?post=2591"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}