{"id":4274,"date":"2022-07-27T17:02:58","date_gmt":"2022-07-27T20:02:58","guid":{"rendered":"https:\/\/categoriaoutros.com.br\/?p=4274"},"modified":"2022-09-14T15:04:59","modified_gmt":"2022-09-14T18:04:59","slug":"php-usando-as-funcoes-filter_has_var-e-isset","status":"publish","type":"post","link":"https:\/\/categoriaoutros.com.br\/?p=4274","title":{"rendered":"PHP: Usando as Fun\u00e7\u00f5es filter_has_var() e isset()"},"content":{"rendered":"\n<p>A fun\u00e7\u00e3o <strong>filter_has_var()<\/strong> verifica se dentro do formul\u00e1rio html existe uma vari\u00e1vel e que seja de determinado tipo. Esse tipo pode ser: INPUT_POST, INPUT_GET, INPUT_COOKIE, INPUT_SERVER ou INPUT_ENV.<\/p>\n\n\n\n<p>A fun\u00e7\u00e3o <strong>isset()<\/strong> retorna true se uma vari\u00e1vel for declarada e n\u00e3o null. \u00a0Por\u00e9m, isset() n\u00e3o verifica se a vari\u00e1vel sendo verificada existe dentro do formul\u00e1rio. Por exemplo, isset() retornar\u00e1 true se a vari\u00e1vel estiver fora do formul\u00e1rio.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Sintaxe para filter_has_var()<\/h2>\n\n\n\n<p>A forma de uso de filter_has_var() \u00e9<\/p>\n\n\n\n<pre class=\"wp-block-code has-white-color has-black-background-color has-text-color has-background\"><code>filter_has_var(INPUT_POST, 'endereco')<\/code><\/pre>\n\n\n\n<p>Acima usei <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">INPUT_POST,<\/mark> mas poderia usar <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">INPUT_GET, INPUT_COOKIE, INPUT_SERVER, or INPUT_ENV<\/mark><\/p>\n\n\n\n<p>&#8216;<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">nome<\/mark>&#8216; \u00e9 o nome da vari\u00e1vel recebida de um formul\u00e1rio atrav\u00e9s do m\u00e9todo POST.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Sintaxe para isset()<\/h2>\n\n\n\n<p>A sintaxe para isset() \u00e9<\/p>\n\n\n\n<pre class=\"wp-block-code has-white-color has-black-background-color has-text-color has-background\"><code>isset($variavel)<\/code><\/pre>\n\n\n\n<p>Se a vari\u00e1vel estiver declarada o retorno ser\u00e1 true.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Exemplo<\/h2>\n\n\n\n<pre class=\"wp-block-code has-white-color has-black-background-color has-text-color has-background\"><code>&lt;?php\n\n       <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\"> $_POST&#91;'endereco'] = \"Rua das madames\";<\/mark>\n\n        if(<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">isset($_POST&#91;'endereco']<\/mark>)) {\n                echo \"a variavel endereco existe\";\n        } else {\n                echo \"endereco n\u00e3o est\u00e1 declarado\";\n        }\n        echo \"&lt;br&gt;\";\n\n        if(<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">filter_has_var(INPUT_POST, 'endereco'<\/mark>)) {\n                echo \"endereco est\u00e1 dentro do form\";\n        } else {\n                echo \"endereco n\u00e3o existe ou n\u00e3o est\u00e1 dentro do form\";\n        }\n\n   ?&gt;<\/code><\/pre>\n\n\n\n<p>resultado:<\/p>\n\n\n\n<pre class=\"wp-block-code has-cyan-bluish-gray-background-color has-background\"><code>a variavel endereco existe\nendereco n\u00e3o existe ou n\u00e3o est\u00e1 dentro do form<\/code><\/pre>\n\n\n\n<p>A primeira linha retorna true porque realmente a vari\u00e1vel <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">$_POST[&#8216;endereco&#8217;]<\/mark> existe<\/p>\n\n\n\n<p>A segunda retorna false porque a vari\u00e1vel <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">$_POST[&#8216;endereco&#8217;]<\/mark> existe mas n\u00e3o dentro de um formul\u00e1rio.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A fun\u00e7\u00e3o filter_has_var() verifica se dentro do formul\u00e1rio html existe uma vari\u00e1vel e que seja de determinado tipo. Esse tipo pode ser: INPUT_POST, INPUT_GET, INPUT_COOKIE, INPUT_SERVER ou INPUT_ENV. A fun\u00e7\u00e3o isset() retorna true se uma vari\u00e1vel for declarada e n\u00e3o null. \u00a0Por\u00e9m, isset() n\u00e3o verifica se a vari\u00e1vel sendo verificada existe dentro do formul\u00e1rio. Por&#8230;<\/p>\n<p class=\"more-link-wrap\"><a href=\"https:\/\/categoriaoutros.com.br\/?p=4274\" class=\"more-link\">Read More<span class=\"screen-reader-text\"> &ldquo;PHP: Usando as Fun\u00e7\u00f5es filter_has_var() e isset()&rdquo;<\/span> &raquo;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16,1622],"tags":[1812,1743,1623,1813],"class_list":["post-4274","post","type-post","status-publish","format-standard","hentry","category-informatica-dicas","category-php","tag-filter_has_var","tag-isset","tag-php","tag-php-form-campo-existe"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>PHP: Usando as Fun\u00e7\u00f5es filter_has_var() e isset() - Categoria Outros<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/categoriaoutros.com.br\/?p=4274\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PHP: Usando as Fun\u00e7\u00f5es filter_has_var() e isset() - Categoria Outros\" \/>\n<meta property=\"og:description\" content=\"A fun\u00e7\u00e3o filter_has_var() verifica se dentro do formul\u00e1rio html existe uma vari\u00e1vel e que seja de determinado tipo. Esse tipo pode ser: INPUT_POST, INPUT_GET, INPUT_COOKIE, INPUT_SERVER ou INPUT_ENV. A fun\u00e7\u00e3o isset() retorna true se uma vari\u00e1vel for declarada e n\u00e3o null. \u00a0Por\u00e9m, isset() n\u00e3o verifica se a vari\u00e1vel sendo verificada existe dentro do formul\u00e1rio. Por...Read More &ldquo;PHP: Usando as Fun\u00e7\u00f5es filter_has_var() e isset()&rdquo; &raquo;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/categoriaoutros.com.br\/?p=4274\" \/>\n<meta property=\"og:site_name\" content=\"Categoria Outros\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/categoriaoutros\" \/>\n<meta property=\"article:published_time\" content=\"2022-07-27T20:02:58+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-09-14T18:04:59+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/categoriaoutros.com.br\/wp-content\/uploads\/2023\/08\/pinguim-paginas-padrao.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1022\" \/>\n\t<meta property=\"og:image:height\" content=\"722\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Categoria: Outros\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@CategoriaOutros\" \/>\n<meta name=\"twitter:site\" content=\"@CategoriaOutros\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"Categoria: Outros\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. tempo de leitura\" \/>\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\":\"Article\",\"@id\":\"https:\/\/categoriaoutros.com.br\/?p=4274#article\",\"isPartOf\":{\"@id\":\"https:\/\/categoriaoutros.com.br\/?p=4274\"},\"author\":{\"name\":\"Categoria: Outros\",\"@id\":\"https:\/\/categoriaoutros.com.br\/#\/schema\/person\/ba0f432708449436912bd6736864bb40\"},\"headline\":\"PHP: Usando as Fun\u00e7\u00f5es filter_has_var() e isset()\",\"datePublished\":\"2022-07-27T20:02:58+00:00\",\"dateModified\":\"2022-09-14T18:04:59+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/categoriaoutros.com.br\/?p=4274\"},\"wordCount\":192,\"commentCount\":1,\"publisher\":{\"@id\":\"https:\/\/categoriaoutros.com.br\/#organization\"},\"keywords\":[\"filter_has_var()\",\"isset()\",\"php\",\"php form campo existe\"],\"articleSection\":[\"Inform\u00e1tica\",\"PHP\"],\"inLanguage\":\"pt-BR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/categoriaoutros.com.br\/?p=4274#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/categoriaoutros.com.br\/?p=4274\",\"url\":\"https:\/\/categoriaoutros.com.br\/?p=4274\",\"name\":\"PHP: Usando as Fun\u00e7\u00f5es filter_has_var() e isset() - Categoria Outros\",\"isPartOf\":{\"@id\":\"https:\/\/categoriaoutros.com.br\/#website\"},\"datePublished\":\"2022-07-27T20:02:58+00:00\",\"dateModified\":\"2022-09-14T18:04:59+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/categoriaoutros.com.br\/?p=4274#breadcrumb\"},\"inLanguage\":\"pt-BR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/categoriaoutros.com.br\/?p=4274\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/categoriaoutros.com.br\/?p=4274#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"In\u00edcio\",\"item\":\"https:\/\/categoriaoutros.com.br\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"PHP: Usando as Fun\u00e7\u00f5es filter_has_var() e isset()\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/categoriaoutros.com.br\/#website\",\"url\":\"https:\/\/categoriaoutros.com.br\/\",\"name\":\"Categoria Outros\",\"description\":\"Assuntos Diversos\",\"publisher\":{\"@id\":\"https:\/\/categoriaoutros.com.br\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/categoriaoutros.com.br\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"pt-BR\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/categoriaoutros.com.br\/#organization\",\"name\":\"Categoria Outros\",\"alternateName\":\"Categoria Outros\",\"url\":\"https:\/\/categoriaoutros.com.br\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pt-BR\",\"@id\":\"https:\/\/categoriaoutros.com.br\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/categoriaoutros.com.br\/wp-content\/uploads\/2023\/08\/categoriaoutros-logo.jpg\",\"contentUrl\":\"https:\/\/categoriaoutros.com.br\/wp-content\/uploads\/2023\/08\/categoriaoutros-logo.jpg\",\"width\":400,\"height\":400,\"caption\":\"Categoria Outros\"},\"image\":{\"@id\":\"https:\/\/categoriaoutros.com.br\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/categoriaoutros\",\"https:\/\/twitter.com\/CategoriaOutros\",\"https:\/\/br.pinterest.com\/CategoriaOutros\/\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/categoriaoutros.com.br\/#\/schema\/person\/ba0f432708449436912bd6736864bb40\",\"name\":\"Categoria: Outros\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pt-BR\",\"@id\":\"https:\/\/categoriaoutros.com.br\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/ed97775f0ab50750ed638ed3417ea85e19ced2c648da167a108e393ae5fd9e33?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/ed97775f0ab50750ed638ed3417ea85e19ced2c648da167a108e393ae5fd9e33?s=96&d=mm&r=g\",\"caption\":\"Categoria: Outros\"},\"sameAs\":[\"http:\/\/categoriaoutros.com.br\"],\"url\":\"https:\/\/categoriaoutros.com.br\/?author=1\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"PHP: Usando as Fun\u00e7\u00f5es filter_has_var() e isset() - Categoria Outros","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/categoriaoutros.com.br\/?p=4274","og_locale":"pt_BR","og_type":"article","og_title":"PHP: Usando as Fun\u00e7\u00f5es filter_has_var() e isset() - Categoria Outros","og_description":"A fun\u00e7\u00e3o filter_has_var() verifica se dentro do formul\u00e1rio html existe uma vari\u00e1vel e que seja de determinado tipo. Esse tipo pode ser: INPUT_POST, INPUT_GET, INPUT_COOKIE, INPUT_SERVER ou INPUT_ENV. A fun\u00e7\u00e3o isset() retorna true se uma vari\u00e1vel for declarada e n\u00e3o null. \u00a0Por\u00e9m, isset() n\u00e3o verifica se a vari\u00e1vel sendo verificada existe dentro do formul\u00e1rio. Por...Read More &ldquo;PHP: Usando as Fun\u00e7\u00f5es filter_has_var() e isset()&rdquo; &raquo;","og_url":"https:\/\/categoriaoutros.com.br\/?p=4274","og_site_name":"Categoria Outros","article_publisher":"https:\/\/www.facebook.com\/categoriaoutros","article_published_time":"2022-07-27T20:02:58+00:00","article_modified_time":"2022-09-14T18:04:59+00:00","og_image":[{"width":1022,"height":722,"url":"https:\/\/categoriaoutros.com.br\/wp-content\/uploads\/2023\/08\/pinguim-paginas-padrao.webp","type":"image\/webp"}],"author":"Categoria: Outros","twitter_card":"summary_large_image","twitter_creator":"@CategoriaOutros","twitter_site":"@CategoriaOutros","twitter_misc":{"Escrito por":"Categoria: Outros","Est. tempo de leitura":"1 minuto"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/categoriaoutros.com.br\/?p=4274#article","isPartOf":{"@id":"https:\/\/categoriaoutros.com.br\/?p=4274"},"author":{"name":"Categoria: Outros","@id":"https:\/\/categoriaoutros.com.br\/#\/schema\/person\/ba0f432708449436912bd6736864bb40"},"headline":"PHP: Usando as Fun\u00e7\u00f5es filter_has_var() e isset()","datePublished":"2022-07-27T20:02:58+00:00","dateModified":"2022-09-14T18:04:59+00:00","mainEntityOfPage":{"@id":"https:\/\/categoriaoutros.com.br\/?p=4274"},"wordCount":192,"commentCount":1,"publisher":{"@id":"https:\/\/categoriaoutros.com.br\/#organization"},"keywords":["filter_has_var()","isset()","php","php form campo existe"],"articleSection":["Inform\u00e1tica","PHP"],"inLanguage":"pt-BR","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/categoriaoutros.com.br\/?p=4274#respond"]}]},{"@type":"WebPage","@id":"https:\/\/categoriaoutros.com.br\/?p=4274","url":"https:\/\/categoriaoutros.com.br\/?p=4274","name":"PHP: Usando as Fun\u00e7\u00f5es filter_has_var() e isset() - Categoria Outros","isPartOf":{"@id":"https:\/\/categoriaoutros.com.br\/#website"},"datePublished":"2022-07-27T20:02:58+00:00","dateModified":"2022-09-14T18:04:59+00:00","breadcrumb":{"@id":"https:\/\/categoriaoutros.com.br\/?p=4274#breadcrumb"},"inLanguage":"pt-BR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/categoriaoutros.com.br\/?p=4274"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/categoriaoutros.com.br\/?p=4274#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"In\u00edcio","item":"https:\/\/categoriaoutros.com.br\/"},{"@type":"ListItem","position":2,"name":"PHP: Usando as Fun\u00e7\u00f5es filter_has_var() e isset()"}]},{"@type":"WebSite","@id":"https:\/\/categoriaoutros.com.br\/#website","url":"https:\/\/categoriaoutros.com.br\/","name":"Categoria Outros","description":"Assuntos Diversos","publisher":{"@id":"https:\/\/categoriaoutros.com.br\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/categoriaoutros.com.br\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"pt-BR"},{"@type":"Organization","@id":"https:\/\/categoriaoutros.com.br\/#organization","name":"Categoria Outros","alternateName":"Categoria Outros","url":"https:\/\/categoriaoutros.com.br\/","logo":{"@type":"ImageObject","inLanguage":"pt-BR","@id":"https:\/\/categoriaoutros.com.br\/#\/schema\/logo\/image\/","url":"https:\/\/categoriaoutros.com.br\/wp-content\/uploads\/2023\/08\/categoriaoutros-logo.jpg","contentUrl":"https:\/\/categoriaoutros.com.br\/wp-content\/uploads\/2023\/08\/categoriaoutros-logo.jpg","width":400,"height":400,"caption":"Categoria Outros"},"image":{"@id":"https:\/\/categoriaoutros.com.br\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/categoriaoutros","https:\/\/twitter.com\/CategoriaOutros","https:\/\/br.pinterest.com\/CategoriaOutros\/"]},{"@type":"Person","@id":"https:\/\/categoriaoutros.com.br\/#\/schema\/person\/ba0f432708449436912bd6736864bb40","name":"Categoria: Outros","image":{"@type":"ImageObject","inLanguage":"pt-BR","@id":"https:\/\/categoriaoutros.com.br\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/ed97775f0ab50750ed638ed3417ea85e19ced2c648da167a108e393ae5fd9e33?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/ed97775f0ab50750ed638ed3417ea85e19ced2c648da167a108e393ae5fd9e33?s=96&d=mm&r=g","caption":"Categoria: Outros"},"sameAs":["http:\/\/categoriaoutros.com.br"],"url":"https:\/\/categoriaoutros.com.br\/?author=1"}]}},"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/categoriaoutros.com.br\/index.php?rest_route=\/wp\/v2\/posts\/4274","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/categoriaoutros.com.br\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/categoriaoutros.com.br\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/categoriaoutros.com.br\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/categoriaoutros.com.br\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4274"}],"version-history":[{"count":7,"href":"https:\/\/categoriaoutros.com.br\/index.php?rest_route=\/wp\/v2\/posts\/4274\/revisions"}],"predecessor-version":[{"id":5433,"href":"https:\/\/categoriaoutros.com.br\/index.php?rest_route=\/wp\/v2\/posts\/4274\/revisions\/5433"}],"wp:attachment":[{"href":"https:\/\/categoriaoutros.com.br\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4274"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/categoriaoutros.com.br\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4274"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/categoriaoutros.com.br\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4274"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}