{"id":807,"date":"2011-09-21T12:57:56","date_gmt":"2011-09-21T12:57:56","guid":{"rendered":"https:\/\/www.jose-aguilar.com\/blog\/?p=807"},"modified":"2013-08-31T16:40:56","modified_gmt":"2013-08-31T16:40:56","slug":"dividir-cadenas-substr-php","status":"publish","type":"post","link":"https:\/\/www.jose-aguilar.com\/blog\/dividir-cadenas-substr-php\/","title":{"rendered":"Dividir cadenas con substr de PHP"},"content":{"rendered":"

La funci\u00f3n substr() de PHP devuelve parte de una cadena.<\/p>\n

string substr<\/strong> ( string $string<\/tt> , int $start<\/tt> [, int $length<\/tt> ] )<\/pre>\n
Devuelve una parte del string<\/tt> definida por los par\u00e1metros start<\/tt> y length<\/tt>.<\/p>\n
La cadena de entrada Debe ser de almenos de un caracter.<\/p>\n
Si el par\u00e1metro start<\/tt> no es negativo, la cadena devuelta comenzar\u00e1 en el start<\/tt> de la posici\u00f3n del string<\/tt> empezando desde cero. Por ejemplo, en la cadena ‘abcdef’, el caracter en la posici\u00f3n 0 es ‘a’, el caracter en la posici\u00f3n 2 es ‘c’, y as\u00ed sucesivamente.<\/p>\n
Si start<\/tt> es negativo, la cadena devuelta empezar\u00e1 en start<\/tt> contando desde el final de string<\/tt>.<\/p>\n
Si la longitud del string<\/tt> es menor o igual a start<\/tt>, la funci\u00f3n devolver\u00e1 FALSE<\/tt>.<\/p>\n
Ejemplo:<\/p>\n
<?php\r\n$rest\u00a0=\u00a0substr(\"abcdef\",\u00a0-1);\u00a0\u00a0\u00a0\u00a0\/\/\u00a0devuelve\u00a0\"f\"\r\n$rest\u00a0=\u00a0substr(\"abcdef\",\u00a0-2);\u00a0\u00a0\u00a0\u00a0\/\/\u00a0devuelve\u00a0\"ef\"\r\n$rest\u00a0=\u00a0substr(\"abcdef\",\u00a0-3,\u00a01);\u00a0\/\/\u00a0devuelve\u00a0\"d\"\r\n?><\/pre>\n
Si se especifica el length<\/tt> y es positivo, la cadena devuelta contendr\u00e1 como m\u00e1ximo de caracteres de la cantidada dada por length<\/tt> que comienza en start<\/tt> (dependiedo de la longitud del string<\/tt>).<\/p>\n
Si se especifica length<\/tt> es negativo, entonces ese n\u00famero de caracteres se omiten al final del string<\/tt> (despu\u00e9s de la posici\u00f3n inicial se ha calculado a start<\/tt> es negativo). Si start<\/tt> indica la posici\u00f3n de su truncamiento o m\u00e1s all\u00e1, se devolver\u00e1 false.<\/p>\n
Si se omite el length<\/tt>, la subcadena empezar\u00e1 por start<\/tt> hasta el final de la cadena donde ser\u00e1 devuelta.<\/p>\n
Si se especifica length<\/tt> y es 0, FALSE<\/tt> o NULL<\/tt> devolver\u00e1 una cadena vac\u00eda.<\/p>\n
Por ejemplo:<\/p>\n
<?php\r\n$rest\u00a0=\u00a0substr(\"abcdef\",\u00a00,\u00a0-1);\u00a0\u00a0\/\/\u00a0devuelve\u00a0\"abcde\"\r\n$rest\u00a0=\u00a0substr(\"abcdef\",\u00a02,\u00a0-1);\u00a0\u00a0\/\/\u00a0devuelve\u00a0\"cde\"\r\n$rest\u00a0=\u00a0substr(\"abcdef\",\u00a04,\u00a0-4);\u00a0\u00a0\/\/\u00a0devuelve\u00a0false\r\n$rest\u00a0=\u00a0substr(\"abcdef\",\u00a0-3,\u00a0-1);\u00a0\/\/\u00a0devuelve\u00a0\"de\"\r\n?><\/pre>\n
La funci\u00f3n substr() devuelve la parte extra\u00edda de la cadena o FALSE<\/tt><\/strong> en caso de error o una cadena vac\u00eda.<\/p>\n","protected":false},"excerpt":{"rendered":"
La funci\u00f3n substr() de PHP devuelve parte de una cadena. string substr ( string $string , int $start [, int $length ] ) Devuelve una parte del string definida por los par\u00e1metros start y length. La cadena de entrada Debe ser de almenos de un caracter. Si el par\u00e1metro start no es negativo, la cadena […]<\/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":[],"class_list":["post-807","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-php"],"yoast_head":"\nDividir cadenas con substr de 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=\"Dividir cadenas con substr de PHP - Jose Aguilar Blog\" \/>\n<meta property=\"og:description\" content=\"La funci\u00f3n substr() de PHP devuelve parte de una cadena. string substr ( string $string , int $start [, int $length ] ) Devuelve una parte del string definida por los par\u00e1metros start y length. La cadena de entrada Debe ser de almenos de un caracter. Si el par\u00e1metro start no es negativo, la cadena […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.jose-aguilar.com\/blog\/dividir-cadenas-substr-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=\"2011-09-21T12:57:56+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2013-08-31T16:40:56+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\/dividir-cadenas-substr-php\/\",\"url\":\"https:\/\/www.jose-aguilar.com\/blog\/dividir-cadenas-substr-php\/\",\"name\":\"Dividir cadenas con substr de PHP - Jose Aguilar Blog\",\"isPartOf\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/dividir-cadenas-substr-php\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/dividir-cadenas-substr-php\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2014\/10\/Imagen-no-disponible-282x300.png\",\"datePublished\":\"2011-09-21T12:57:56+00:00\",\"dateModified\":\"2013-08-31T16:40:56+00:00\",\"author\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/#\/schema\/person\/e6d485db1e1140866e95971d17105d11\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/dividir-cadenas-substr-php\/#breadcrumb\"},\"inLanguage\":\"es\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.jose-aguilar.com\/blog\/dividir-cadenas-substr-php\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"es\",\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/dividir-cadenas-substr-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\/dividir-cadenas-substr-php\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Portada\",\"item\":\"https:\/\/www.jose-aguilar.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Dividir cadenas con substr de 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":"Dividir cadenas con substr de 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":"Dividir cadenas con substr de PHP - Jose Aguilar Blog","og_description":"La funci\u00f3n substr() de PHP devuelve parte de una cadena. string substr ( string $string , int $start [, int $length ] ) Devuelve una parte del string definida por los par\u00e1metros start y length. La cadena de entrada Debe ser de almenos de un caracter. Si el par\u00e1metro start no es negativo, la cadena […]","og_url":"https:\/\/www.jose-aguilar.com\/blog\/dividir-cadenas-substr-php\/","og_site_name":"Jose Aguilar Blog","article_publisher":"https:\/\/www.facebook.com\/joseaguilarblog","article_published_time":"2011-09-21T12:57:56+00:00","article_modified_time":"2013-08-31T16:40:56+00:00","og_image":[{"width":282,"height":300,"url":"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2014\/10\/Imagen-no-disponible-282x300.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":"2 minutos"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.jose-aguilar.com\/blog\/dividir-cadenas-substr-php\/","url":"https:\/\/www.jose-aguilar.com\/blog\/dividir-cadenas-substr-php\/","name":"Dividir cadenas con substr de PHP - Jose Aguilar Blog","isPartOf":{"@id":"https:\/\/www.jose-aguilar.com\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.jose-aguilar.com\/blog\/dividir-cadenas-substr-php\/#primaryimage"},"image":{"@id":"https:\/\/www.jose-aguilar.com\/blog\/dividir-cadenas-substr-php\/#primaryimage"},"thumbnailUrl":"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2014\/10\/Imagen-no-disponible-282x300.png","datePublished":"2011-09-21T12:57:56+00:00","dateModified":"2013-08-31T16:40:56+00:00","author":{"@id":"https:\/\/www.jose-aguilar.com\/blog\/#\/schema\/person\/e6d485db1e1140866e95971d17105d11"},"breadcrumb":{"@id":"https:\/\/www.jose-aguilar.com\/blog\/dividir-cadenas-substr-php\/#breadcrumb"},"inLanguage":"es","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.jose-aguilar.com\/blog\/dividir-cadenas-substr-php\/"]}]},{"@type":"ImageObject","inLanguage":"es","@id":"https:\/\/www.jose-aguilar.com\/blog\/dividir-cadenas-substr-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\/dividir-cadenas-substr-php\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Portada","item":"https:\/\/www.jose-aguilar.com\/blog\/"},{"@type":"ListItem","position":2,"name":"Dividir cadenas con substr de 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\/807","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=807"}],"version-history":[{"count":0,"href":"https:\/\/www.jose-aguilar.com\/blog\/wp-json\/wp\/v2\/posts\/807\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jose-aguilar.com\/blog\/wp-json\/wp\/v2\/media\/6469"}],"wp:attachment":[{"href":"https:\/\/www.jose-aguilar.com\/blog\/wp-json\/wp\/v2\/media?parent=807"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.jose-aguilar.com\/blog\/wp-json\/wp\/v2\/categories?post=807"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.jose-aguilar.com\/blog\/wp-json\/wp\/v2\/tags?post=807"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}