{"id":1067,"date":"2011-11-01T18:26:13","date_gmt":"2011-11-01T18:26:13","guid":{"rendered":"https:\/\/www.jose-aguilar.com\/blog\/?p=1067"},"modified":"2012-02-26T14:28:36","modified_gmt":"2012-02-26T14:28:36","slug":"array-push-php","status":"publish","type":"post","link":"https:\/\/www.jose-aguilar.com\/blog\/array-push-php\/","title":{"rendered":"Insertar y extraer elementos de un array\u200f con PHP"},"content":{"rendered":"<p>En PHP para insertar o extraer elementos a un array lo podemos hacer de varias formas. En este art\u00edculo vamos a explicar como funcionan las funciones que nos facilita la librer\u00eda: <strong>array_push()<\/strong> y<strong> array_pop()<\/strong>.<\/p>\n<p>La funci\u00f3n <strong>array_push()<\/strong> inserta uno o m\u00e1s elementos al final de un array. Su estructura es la siguiente:<\/p>\n<pre>int <strong>array_push<\/strong> ( array <tt>&amp;$array<\/tt> , <a href=\"http:\/\/www.php.net\/manual\/es\/language.pseudo-types.php#language.types.mixed\">mixed<\/a> <tt>$var<\/tt> [, <a href=\"http:\/\/www.php.net\/manual\/es\/language.pseudo-types.php#language.types.mixed\">mixed<\/a> <tt>$...<\/tt> ] )<\/pre>\n<p>La variable $array es el vector de entrada y $var el valor a insertar. <strong><\/strong><\/p>\n<p><strong>Array_push()<\/strong> trata <tt>array<\/tt>\u00a0 como si fuera una pila y empuja la variable que se le pasa al final del <tt>array<\/tt>. El tama\u00f1o del <tt>array<\/tt> ser\u00e1 incrementado por el n\u00famero de variables insertados.<\/p>\n<p>Si se utiliza <strong>array_push()<\/strong> para a\u00f1adir un solo elemento en el array, es mejor utilizar <em>$array[] = <\/em> ya que de esta forma no existe la sobrecarga de llamar a una funci\u00f3n.<\/p>\n<p>La funci\u00f3n devuelve el nuevo n\u00famero de elementos en un array.<\/p>\n<p>La funci\u00f3n <strong>array_pop()<\/strong> extrae el \u00faltimo elemento del final del array. Su estructura es la siguiente:<\/p>\n<pre><strong>array_pop<\/strong> ( array <tt>&amp;$array<\/tt> )<\/pre>\n<p><strong>array_pop()<\/strong> extrae y devuelve el \u00faltimo valor del <tt>array<\/tt>, acortando el <tt>array<\/tt> con un elemento menos. Si el <tt>array<\/tt> est\u00e1 vac\u00edo (o no es un array), se devolver\u00e1 <strong><tt>NULL<\/tt><\/strong>. Adem\u00e1s se producir\u00e1 un <a href=\"http:\/\/www.php.net\/manual\/es\/errorfunc.constants.php#errorfunc.constants.errorlevels.e-warning\">Warning<\/a> cuando se llame a un elemento que no es un array.<\/p>\n<p>La funci\u00f3n devuelve el \u00faltimo valor del <tt>array<\/tt>. Si el <tt>array<\/tt> est\u00e1 vac\u00edo (o no es un array), se devolver\u00e1 <strong><tt>NULL<\/tt><\/strong>.<\/p>\n<p>Vamos a ver un ejemplo de aplicaci\u00f3n:<\/p>\n<pre>&lt;?php\r\n\/\/Array inicial\r\n$data = array(\"Lunes\", \"Martes\", \"Mi\u00e9rcoles\", \"Jueves\");\r\n\/\/A\u00f1adimos los valores Viernes y S\u00e1bado al array\r\narray_push($data, \"Viernes\", \"S\u00e1bado\");\r\n\/\/Eliminamos el \u00faltimo elemento del array\r\n$last_element = array_pop($data);\r\n?&gt;<\/pre>\n<p><a href=\"https:\/\/www.jose-aguilar.com\/scripts\/php\/array_push_pop\/\">Ver el ejemplo en funcionamiento<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>En PHP para insertar o extraer elementos a un array lo podemos hacer de varias formas. En este art\u00edculo vamos a explicar como funcionan las funciones que nos facilita la librer\u00eda: array_push() y array_pop(). La funci\u00f3n array_push() inserta uno o m\u00e1s elementos al final de un array. Su estructura es la siguiente: int array_push ( [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":6469,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[38],"class_list":["post-1067","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-php","tag-arrays"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Insertar y extraer elementos de un array\u200f 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=\"Insertar y extraer elementos de un array\u200f con PHP - Jose Aguilar Blog\" \/>\n<meta property=\"og:description\" content=\"En PHP para insertar o extraer elementos a un array lo podemos hacer de varias formas. 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Su estructura es la siguiente: int array_push ( [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.jose-aguilar.com\/blog\/array-push-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=\"2011-11-01T18:26:13+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2012-02-26T14:28:36+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2014\/10\/Imagen-no-disponible-282x300.png\" \/>\n\t<meta property=\"og:image:width\" content=\"282\" \/>\n\t<meta property=\"og:image:height\" content=\"300\" \/>\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=\"2 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/array-push-php\/\",\"url\":\"https:\/\/www.jose-aguilar.com\/blog\/array-push-php\/\",\"name\":\"Insertar y extraer elementos de un array\u200f con PHP - Jose Aguilar Blog\",\"isPartOf\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/array-push-php\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/array-push-php\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2014\/10\/Imagen-no-disponible-282x300.png\",\"datePublished\":\"2011-11-01T18:26:13+00:00\",\"dateModified\":\"2012-02-26T14:28:36+00:00\",\"author\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/#\/schema\/person\/e6d485db1e1140866e95971d17105d11\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/array-push-php\/#breadcrumb\"},\"inLanguage\":\"es\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.jose-aguilar.com\/blog\/array-push-php\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"es\",\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/array-push-php\/#primaryimage\",\"url\":\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2014\/10\/Imagen-no-disponible-282x300.png\",\"contentUrl\":\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2014\/10\/Imagen-no-disponible-282x300.png\",\"width\":282,\"height\":300},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/array-push-php\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Portada\",\"item\":\"https:\/\/www.jose-aguilar.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Insertar y extraer elementos de un array\u200f 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. 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