{"id":1052,"date":"2024-05-20T20:40:09","date_gmt":"2024-05-20T23:40:09","guid":{"rendered":"https:\/\/thiagorossi.com.br\/blog\/?p=1052"},"modified":"2025-12-02T19:19:51","modified_gmt":"2025-12-02T22:19:51","slug":"json-com-php","status":"publish","type":"post","link":"https:\/\/thiagorossi.com.br\/blog\/json-com-php\/","title":{"rendered":"JSON com 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>JSON com PHP<\/strong>: <strong>JSON (JavaScript Object Notation)<\/strong> \u00e9 o formato de interc\u00e2mbio de dados mais popular na web, devido \u00e0 sua <strong>leveza<\/strong> e <strong>f\u00e1cil leitura<\/strong> (tanto por humanos quanto por m\u00e1quinas). A capacidade do <strong>PHP<\/strong> de converter dados estruturados (arrays e objetos) para JSON e vice-versa \u00e9 fundamental para criar APIs RESTful e interagir com servi\u00e7os externos.<\/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. \u27a1\ufe0f Codifica\u00e7\u00e3o: PHP para JSON (<code>json_encode<\/code>)<\/h2>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">A fun\u00e7\u00e3o <strong><code>json_encode()<\/code><\/strong> \u00e9 respons\u00e1vel por converter estruturas de dados PHP (arrays ou objetos) em uma <em>string<\/em> no formato JSON.<\/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. Convers\u00e3o de Arrays PHP<\/h3>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Um <strong>array associativo<\/strong> em PHP \u00e9 convertido em um <strong>objeto JSON<\/strong>, e um <strong>array indexado<\/strong> (sem chaves sequenciais) \u00e9 convertido em um <strong>array JSON<\/strong>.<\/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\n$dados = &#91;\n    'nome' =&gt; 'Jo\u00e3o',\n    'idade' =&gt; 30,\n    'cidade' =&gt; 'S\u00e3o Paulo'\n];\n\n$json_string = json_encode($dados);\n\/\/ Sa\u00edda JSON (Objeto): {\"nome\":\"Jo\u00e3o\",\"idade\":30,\"cidade\":\"S\u00e3o Paulo\"}\necho $json_string;\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\">B. Convers\u00e3o de Objetos PHP<\/h3>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Ao codificar um <strong>objeto PHP<\/strong>, apenas as <strong>propriedades p\u00fablicas<\/strong> s\u00e3o inclu\u00eddas no objeto JSON resultante.<\/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\nclass Pessoa {\n    public $nome;\n    private $cpf; \/\/ Propriedades privadas n\u00e3o s\u00e3o inclu\u00eddas por padr\u00e3o\n\n    public function __construct($nome, $cpf) {\n        $this-&gt;nome = $nome;\n        $this-&gt;cpf = $cpf;\n    }\n}\n\n$pessoa = new Pessoa('Ana', '123.456.789-00');\n$json = json_encode($pessoa);\n\/\/ Sa\u00edda JSON (Objeto): {\"nome\":\"Ana\"}\necho $json;\n?&gt;\n<\/code><\/pre>\n\n\n\n<div style=\"height:35px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading has-large-font-size\">2. \u2b05\ufe0f Decodifica\u00e7\u00e3o: JSON para PHP (<code>json_decode<\/code>)<\/h2>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">A fun\u00e7\u00e3o <strong><code>json_decode()<\/code><\/strong> analisa uma <em>string<\/em> JSON e a converte em estruturas de dados PHP. O segundo par\u00e2metro desta fun\u00e7\u00e3o \u00e9 crucial:<\/p>\n\n\n\n<figure class=\"wp-block-table has-medium-font-size\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Par\u00e2metro<\/strong><\/td><td><strong>Valor<\/strong><\/td><td><strong>Tipo de Sa\u00edda PHP<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>Omitido (padr\u00e3o)<\/strong><\/td><td><code>false<\/code><\/td><td><strong>Objeto<\/strong> PHP padr\u00e3o (<code>stdClass<\/code>).<\/td><\/tr><tr><td><strong><code>associativo<\/code><\/strong><\/td><td><code>true<\/code><\/td><td><strong>Array Associativo<\/strong> PHP.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div style=\"height:35px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Exemplo de Decodifica\u00e7\u00e3o<\/h3>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">PHP<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\n$json_input = '{\"nome\":\"Maria\",\"idade\":25}';\n\n\/\/ Op\u00e7\u00e3o 1: Decodificar para Objeto PHP (acesso via -&gt;)\n$dados_obj = json_decode($json_input);\necho $dados_obj-&gt;nome; \/\/ Sa\u00edda: Maria\n\n\/\/ Op\u00e7\u00e3o 2: Decodificar para Array Associativo (acesso via &#91;])\n$dados_arr = json_decode($json_input, true);\necho $dados_arr&#91;'idade']; \/\/ Sa\u00edda: 25\n?&gt;\n<\/code><\/pre>\n\n\n\n<div style=\"height:35px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading has-large-font-size\">3. \u26a0\ufe0f Tratamento de Erros e Boas Pr\u00e1ticas<\/h2>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">\u00c9 fundamental verificar se a codifica\u00e7\u00e3o ou decodifica\u00e7\u00e3o foi bem-sucedida, especialmente ao receber dados de fontes externas (APIs ou <em>inputs<\/em> do usu\u00e1rio).<\/p>\n\n\n\n<div style=\"height:35px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">A. Verifica\u00e7\u00e3o de Erro<\/h3>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Ap\u00f3s chamar <code>json_encode()<\/code> ou <code>json_decode()<\/code>, use as fun\u00e7\u00f5es abaixo:<\/p>\n\n\n\n<figure class=\"wp-block-table has-medium-font-size\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Fun\u00e7\u00e3o<\/strong><\/td><td><strong>Prop\u00f3sito<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong><code>json_last_error()<\/code><\/strong><\/td><td>Retorna um c\u00f3digo de erro (deve ser <strong><code>JSON_ERROR_NONE<\/code><\/strong> em caso de sucesso).<\/td><\/tr><tr><td><strong><code>json_last_error_msg()<\/code><\/strong><\/td><td>Retorna a mensagem de erro correspondente.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">PHP<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\n$json_invalido = '{nome:\"Jo\u00e3o\"}'; \/\/ JSON inv\u00e1lido: chaves de string devem ser aspas duplas\n\njson_decode($json_invalido);\n\nif (json_last_error() !== JSON_ERROR_NONE) {\n    echo 'Erro ao decodificar JSON: ' . json_last_error_msg();\n}\n?&gt;\n<\/code><\/pre>\n\n\n\n<div style=\"height:35px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">B. Criando uma API (Servi\u00e7o Web RESTful)<\/h3>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Ao criar um servi\u00e7o que deve retornar JSON, voc\u00ea precisa definir o <em>Header<\/em> HTTP correto para informar ao cliente o tipo de conte\u00fado.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">PHP<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\n\/\/ 1. Define o cabe\u00e7alho de resposta como JSON\nheader('Content-Type: application\/json');\n\n$usuarios = &#91;\n    &#91;'id' =&gt; 1, 'nome' =&gt; 'Jo\u00e3o', 'status' =&gt; 'ativo'],\n    &#91;'id' =&gt; 2, 'nome' =&gt; 'Maria', 'status' =&gt; 'inativo']\n];\n\n\/\/ 2. Codifica e envia a resposta\necho json_encode($usuarios);\nexit;\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\">C. Integra\u00e7\u00e3o com APIs Externas<\/h3>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Para consumir dados de APIs externas, voc\u00ea deve usar cURL (ou uma biblioteca moderna como Guzzle) para fazer a requisi\u00e7\u00e3o HTTP e, em seguida, decodificar a resposta JSON.<\/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\n\/\/ ... (C\u00f3digo cURL para fazer a requisi\u00e7\u00e3o GET, como visto no artigo anterior)\n\/\/ Assume que $resposta \u00e9 a string JSON recebida\n\n$dados_api = json_decode($resposta, true); \n\nif (json_last_error() === JSON_ERROR_NONE) {\n    \/\/ Processa os dados\n    foreach ($dados_api as $usuario) {\n        echo \"ID: \" . $usuario&#91;'id'] . \", Nome: \" . $usuario&#91;'nome'] . \"&lt;br&gt;\";\n    }\n} else {\n    echo \"Falha ao analisar a resposta JSON da API.\";\n}\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<h2 class=\"wp-block-heading has-large-font-size\">\u2705 Conclus\u00e3o JSON com PHP<\/h2>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">JSON com PHP: O JSON \u00e9 o formato de dados <em>de facto<\/em> para a web moderna. As fun\u00e7\u00f5es nativas <strong><code>json_encode()<\/code><\/strong> e <strong><code>json_decode()<\/code><\/strong> do PHP fornecem todas as ferramentas necess\u00e1rias para serializar e desserializar dados de forma eficiente. Ao dominar essas fun\u00e7\u00f5es e utiliz\u00e1-las com o tratamento de erros adequado, voc\u00ea estar\u00e1 apto a construir e consumir <strong>APIs RESTful<\/strong> robustas e a criar aplica\u00e7\u00f5es web din\u00e2micas e escal\u00e1veis.<\/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","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>JSON com PHP: JSON (JavaScript Object Notation) \u00e9 o formato de interc\u00e2mbio de dados mais&#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-1052","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>JSON com PHP - BLOG THIAGO ROSSI<\/title>\n<meta name=\"description\" content=\"JSON com PHP: Neste artigo, exploraremos as funcionalidades do JSON em PHP, desde a codifica\u00e7\u00e3o e decodifica\u00e7\u00e3o de dados at\u00e9 a integra\u00e7\u00e3o...\" \/>\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\/json-com-php\/\" \/>\n<meta property=\"og:locale\" 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