{"id":1000,"date":"2024-05-15T22:19:44","date_gmt":"2024-05-16T01:19:44","guid":{"rendered":"https:\/\/thiagorossi.com.br\/blog\/?p=1000"},"modified":"2025-12-01T16:34:07","modified_gmt":"2025-12-01T19:34:07","slug":"seu-primeiro-programa-php","status":"publish","type":"post","link":"https:\/\/thiagorossi.com.br\/blog\/seu-primeiro-programa-php\/","title":{"rendered":"Seu Primeiro Programa PHP"},"content":{"rendered":"<span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Tempo de leitura: <\/span> <span class=\"rt-time\"> 4<\/span> <span class=\"rt-label rt-postfix\">minutos<\/span><\/span>\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>Seu Primeiro Programa PHP<\/strong>: O <strong>PHP (Hypertext Preprocessor)<\/strong> \u00e9 a linguagem fundamental para criar p\u00e1ginas web din\u00e2micas e orientadas a dados. Sua sintaxe direta e a grande compatibilidade com servidores o tornam um ponto de partida excelente para qualquer programador web.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Este tutorial guiar\u00e1 voc\u00ea na cria\u00e7\u00e3o e execu\u00e7\u00e3o do seu primeiro <em>script<\/em> PHP, o tradicional &#8220;Hello, World!&#8221;.<\/p>\n\n\n\n<div style=\"height:35px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading has-large-font-size\">1. \u2699\ufe0f Configurando o Ambiente<\/h2>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Antes de escrever qualquer c\u00f3digo PHP, voc\u00ea precisa de dois componentes principais:<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li class=\"has-medium-font-size\"><strong>Editor de Texto:<\/strong> Um software para escrever e salvar seu c\u00f3digo (ex: <strong>Visual Studio Code<\/strong>, Sublime Text, Notepad++).<\/li>\n\n\n\n<li class=\"has-medium-font-size\"><strong>Servidor Web Local:<\/strong> O PHP \u00e9 uma linguagem do lado do servidor. Voc\u00ea precisa de um ambiente local (como <strong>XAMPP<\/strong>, <strong>WAMP<\/strong> ou <strong>Laragon<\/strong>) que simule um servidor real e inclua o interpretador PHP.\n<ul class=\"wp-block-list\">\n<li>O servidor local possui um diret\u00f3rio raiz onde voc\u00ea deve salvar seus arquivos, geralmente chamado de <strong><code>htdocs<\/code><\/strong> (no XAMPP) ou <strong><code>www<\/code><\/strong> (no WAMP).<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<div style=\"height:35px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading has-large-font-size\">2. \ud83d\udcdd Criando o Arquivo <code>hello.php<\/code><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Passo 1: Crie e Salve o Arquivo<\/h3>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Abra seu editor de texto e crie um novo arquivo. Salve-o imediatamente no diret\u00f3rio raiz do seu servidor local (ex: <code>C:\\xampp\\htdocs\\<\/code> no Windows ou \/var\/www\/html no Linux) com o nome <strong><code>hello.php<\/code><\/strong>.<\/p>\n\n\n\n<div style=\"height:35px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Passo 2: Escreva o C\u00f3digo PHP<\/h3>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Insira o c\u00f3digo abaixo no arquivo <code>hello.php<\/code>.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">PHP<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\necho \"Hello World PHP!\";\n?&gt;\n<\/code><\/pre>\n\n\n\n<div style=\"height:35px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Entendendo o C\u00f3digo<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-medium-font-size\"><strong><code>&lt;?php<\/code> e <code>?><\/code>:<\/strong> Estas s\u00e3o as <strong>tags de abertura e fechamento<\/strong> do PHP. Todo o c\u00f3digo PHP a ser executado no servidor deve estar contido entre elas.<\/li>\n\n\n\n<li class=\"has-medium-font-size\"><strong><code>echo<\/code>:<\/strong> Uma constru\u00e7\u00e3o de linguagem fundamental do PHP usada para <strong>exibir (imprimir)<\/strong> strings ou valores no fluxo de sa\u00edda, que, neste caso, \u00e9 a p\u00e1gina HTML enviada ao navegador.<\/li>\n\n\n\n<li class=\"has-medium-font-size\"><strong><code>\"Hello World PHP!\"<\/code>:<\/strong> A <strong>string<\/strong> (texto) que ser\u00e1 exibida.<\/li>\n\n\n\n<li class=\"has-medium-font-size\"><strong><code>;<\/code> (Ponto e V\u00edrgula):<\/strong> O terminador de instru\u00e7\u00e3o no PHP. Cada comando deve ser finalizado com um ponto e v\u00edrgula.<\/li>\n<\/ul>\n\n\n\n<div style=\"height:35px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading has-large-font-size\">3. \u25b6\ufe0f Executando o Programa<\/h2>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Para rodar o <em>script<\/em>, voc\u00ea deve acess\u00e1-lo atrav\u00e9s do servidor web local.<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li class=\"has-medium-font-size\"><strong>Inicie o Servidor:<\/strong> Certifique-se de que os servi\u00e7os <strong>Apache<\/strong> (servidor web) e <strong>PHP<\/strong> estejam rodando no seu XAMPP\/WAMP\/Laragon.<\/li>\n\n\n\n<li class=\"has-medium-font-size\"><strong>Acesse no Navegador:<\/strong> Abra seu navegador (Chrome, Firefox, etc.) e digite o endere\u00e7o local, seguido do nome do arquivo:<code>http:\/\/localhost\/hello.php<\/code><\/li>\n<\/ol>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>Resultado:<\/strong> Voc\u00ea ver\u00e1 a mensagem <strong>&#8220;Hello World PHP!&#8221;<\/strong> exibida na tela, como resultado do processamento do <em>script<\/em> pelo servidor.<\/p>\n\n\n\n<div style=\"height:35px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading has-large-font-size\">4. \ud83d\udca1 Indo Al\u00e9m: Fundamentos Essenciais do PHP<\/h2>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">O PHP \u00e9 uma linguagem rica, e estes s\u00e3o os blocos de constru\u00e7\u00e3o que voc\u00ea usar\u00e1 para criar aplica\u00e7\u00f5es complexas:<\/p>\n\n\n\n<div style=\"height:35px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">A. Vari\u00e1veis<\/h3>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Em PHP, as vari\u00e1veis s\u00e3o declaradas usando o s\u00edmbolo <strong><code>$<\/code><\/strong> (cifr\u00e3o). Elas n\u00e3o exigem declara\u00e7\u00e3o de tipo pr\u00e9via (s\u00e3o de tipagem din\u00e2mica).<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">PHP<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$nome = \"Jo\u00e3o\";\n$idade = 30; \/\/ Vari\u00e1vel num\u00e9rica (inteiro)\n\n\/\/ Aspas duplas permitem interpola\u00e7\u00e3o de vari\u00e1veis\necho \"Meu nome \u00e9 $nome e tenho $idade anos.\"; \n<\/code><\/pre>\n\n\n\n<div style=\"height:35px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">B. Operadores<\/h3>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Usados para realizar c\u00e1lculos e compara\u00e7\u00f5es.<\/p>\n\n\n\n<figure class=\"wp-block-table has-medium-font-size\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Tipo<\/strong><\/td><td><strong>Operador<\/strong><\/td><td><strong>Exemplo<\/strong><\/td><td><strong>Descri\u00e7\u00e3o<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>Aritm\u00e9tico<\/strong><\/td><td><code>+<\/code>, <code>-<\/code>, <code>*<\/code>, <code>\/<\/code><\/td><td><code>$x + $y<\/code><\/td><td>Adi\u00e7\u00e3o, Subtra\u00e7\u00e3o, Multiplica\u00e7\u00e3o, Divis\u00e3o<\/td><\/tr><tr><td><strong>Compara\u00e7\u00e3o<\/strong><\/td><td><code>==<\/code>, <code>!=<\/code>, <code>&gt;<\/code>, <code>&lt;<\/code><\/td><td><code>$x == $y<\/code><\/td><td>Verifica se os valores s\u00e3o iguais<\/td><\/tr><tr><td><strong>L\u00f3gico<\/strong><\/td><td><code>&amp;&amp;<\/code> (AND), <code>||(OR),<\/code><br>! (NOT)<\/td><td>if($logado &amp;&amp; $admin){&#8230;}<br><\/td><td>Verifica\u00e7\u00e3o l\u00f3gica que retorna <em>true<\/em> ou <em>false<\/em><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div style=\"height:35px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">C. Estruturas de Controle (Condicionais)<\/h3>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Permitem que o c\u00f3digo tome decis\u00f5es com base em condi\u00e7\u00f5es.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">PHP<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$idade = 25;\n\nif ($idade &gt;= 18) {\n    echo \"Voc\u00ea \u00e9 maior de idade.\";\n} else {\n    echo \"Voc\u00ea \u00e9 menor de idade.\";\n}\n\n\/\/ Outras estruturas: switch, while, do-while, foreach.\n<\/code><\/pre>\n\n\n\n<div style=\"height:35px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">D. Fun\u00e7\u00f5es<\/h3>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Blocos de c\u00f3digo reutiliz\u00e1veis que realizam tarefas espec\u00edficas, promovendo a modularidade.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">PHP<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>function saudacao($nome) {\n    \/\/ C\u00f3digo dentro da fun\u00e7\u00e3o\n    echo \"Ol\u00e1, $nome!\";\n}\n\nsaudacao(\"Maria\"); \/\/ Chama a fun\u00e7\u00e3o, imprime \"Ol\u00e1, Maria!\"\n<\/code><\/pre>\n\n\n\n<div style=\"height:35px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading has-large-font-size\">\u2705 Conclus\u00e3o Seu Primeiro Programa PHP<\/h2>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Seu Primeiro Programa PHP: Ao configurar seu ambiente local e executar o <em>script<\/em> <strong>&#8220;Hello, World!&#8221;<\/strong>, voc\u00ea deu o passo fundamental para o desenvolvimento web com PHP. A simplicidade inicial do PHP se combina com a profundidade de seus recursos (vari\u00e1veis, operadores e estruturas de controle), abrindo um vasto universo para a cria\u00e7\u00e3o de sistemas de gerenciamento de conte\u00fado, e-commerces e muito mais.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Toda jornada tem um in\u00edcio, e o in\u00edcio para se tornar um desenvolvedor back-end \u00e9 dominar as seguintes tecnologias, que voc\u00ea encontra aqui mesmo:<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"\/category\/sql\"><img loading=\"lazy\" decoding=\"async\" width=\"758\" height=\"426\" src=\"https:\/\/thiagorossi.com.br\/blog\/wp-content\/uploads\/2024\/05\/Capa-Artigos-2.webp\" alt=\"SQL\" class=\"wp-image-942\" srcset=\"https:\/\/thiagorossi.com.br\/blog\/wp-content\/uploads\/2024\/05\/Capa-Artigos-2.webp 758w, https:\/\/thiagorossi.com.br\/blog\/wp-content\/uploads\/2024\/05\/Capa-Artigos-2-300x169.webp 300w\" sizes=\"auto, (max-width: 758px) 100vw, 758px\" \/><\/a><figcaption class=\"wp-element-caption\">SQL<\/figcaption><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"\/category\/php\"><img loading=\"lazy\" decoding=\"async\" width=\"758\" height=\"426\" src=\"https:\/\/thiagorossi.com.br\/blog\/wp-content\/uploads\/2024\/11\/Capa-PHP.png\" alt=\"Capa Curso PHP\" class=\"wp-image-2835\" srcset=\"https:\/\/thiagorossi.com.br\/blog\/wp-content\/uploads\/2024\/11\/Capa-PHP.png 758w, https:\/\/thiagorossi.com.br\/blog\/wp-content\/uploads\/2024\/11\/Capa-PHP-300x169.png 300w\" sizes=\"auto, (max-width: 758px) 100vw, 758px\" \/><\/a><figcaption class=\"wp-element-caption\">PHP<\/figcaption><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"\/category\/laravel\"><img loading=\"lazy\" decoding=\"async\" width=\"758\" height=\"426\" src=\"https:\/\/thiagorossi.com.br\/blog\/wp-content\/uploads\/2024\/11\/Laravel.webp\" alt=\"Laravel\" class=\"wp-image-1642\" srcset=\"https:\/\/thiagorossi.com.br\/blog\/wp-content\/uploads\/2024\/11\/Laravel.webp 758w, https:\/\/thiagorossi.com.br\/blog\/wp-content\/uploads\/2024\/11\/Laravel-300x169.webp 300w\" sizes=\"auto, (max-width: 758px) 100vw, 758px\" \/><\/a><figcaption class=\"wp-element-caption\">Laravel<\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">E se voc\u00ea gosta do nosso conte\u00fado, n\u00e3o deixe de contribuir adquirindo os servi\u00e7os e produtos dos nossos apoiadores e empresas que somos associados:<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/hostinger.com.br\/?REFERRALCODE=1THIAGO62\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"250\" src=\"https:\/\/thiagorossi.com.br\/blog\/wp-content\/uploads\/2024\/03\/hostinger.png\" alt=\"Hospedagem Hostinger\" class=\"wp-image-92\"\/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/amzn.to\/3SNDYlc\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"250\" src=\"https:\/\/thiagorossi.com.br\/blog\/wp-content\/uploads\/2024\/08\/ofertas-amazon.webp\" alt=\"Ofertas Amazon\" class=\"wp-image-1308\"\/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/amzn.to\/3SNKmt0\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"250\" src=\"https:\/\/thiagorossi.com.br\/blog\/wp-content\/uploads\/2024\/08\/amazonprime.webp\" alt=\"Amazon Prime\" class=\"wp-image-1307\"\/><\/a><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Tempo de leitura: <\/span> <span class=\"rt-time\"> 4<\/span> <span class=\"rt-label rt-postfix\">minutos<\/span><\/span>Seu Primeiro Programa PHP: O PHP (Hypertext Preprocessor) \u00e9 a linguagem fundamental para criar p\u00e1ginas&#8230;<\/p>\n","protected":false},"author":1,"featured_media":2835,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-1000","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-php","wpcat-11-id"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Seu Primeiro Programa PHP - BLOG THIAGO ROSSI<\/title>\n<meta name=\"description\" content=\"Seu Primeiro Programa PHP: Neste tutorial, voc\u00ea aprender\u00e1 a criar seu primeiro programa em PHP, o cl\u00e1ssico &quot;Hello, World!&quot;....\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/thiagorossi.com.br\/blog\/seu-primeiro-programa-php\/\" \/>\n<meta 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