{"id":1036,"date":"2024-05-20T19:46:44","date_gmt":"2024-05-20T22:46:44","guid":{"rendered":"https:\/\/thiagorossi.com.br\/blog\/?p=1036"},"modified":"2025-12-02T16:36:05","modified_gmt":"2025-12-02T19:36:05","slug":"errors-e-exceptions-ph","status":"publish","type":"post","link":"https:\/\/thiagorossi.com.br\/blog\/errors-e-exceptions-ph\/","title":{"rendered":"Errors e Exceptions 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>Errors e Exceptions PHP<\/strong>: O gerenciamento de <strong>erros<\/strong> e <strong>exce\u00e7\u00f5es<\/strong> \u00e9 crucial para a <strong>robustez<\/strong> e <strong>seguran\u00e7a<\/strong> de qualquer aplica\u00e7\u00e3o PHP. Um mecanismo de tratamento de erros bem implementado evita falhas inesperadas (os temidos <em>crashes<\/em>) e garante uma melhor experi\u00eancia ao usu\u00e1rio.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Embora erros e exce\u00e7\u00f5es lidem com desvios no fluxo normal do programa, eles s\u00e3o tratados de maneiras distintas no PHP.<\/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. \ud83d\udea8 Tipos de Erros Tradicionais em PHP<\/h2>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Os erros tradicionais do PHP s\u00e3o eventos baseados em <em>n\u00edvel de erro<\/em> que o motor detecta.<\/p>\n\n\n\n<figure class=\"wp-block-table has-medium-font-size\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Tipo de Erro<\/strong><\/td><td><strong>N\u00edvel<\/strong><\/td><td><strong>Descri\u00e7\u00e3o<\/strong><\/td><td><strong>Impacto na Execu\u00e7\u00e3o<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>Fatal Errors<\/strong><\/td><td><code>E_ERROR<\/code><\/td><td>Erros cr\u00edticos (ex: chamar uma classe inexistente, <code>require<\/code> falho).<\/td><td><strong>Interrompe a execu\u00e7\u00e3o<\/strong> do <em>script<\/em> imediatamente.<\/td><\/tr><tr><td><strong>Warnings<\/strong><\/td><td><code>E_WARNING<\/code><\/td><td>Avisos n\u00e3o fatais (ex: chamar uma fun\u00e7\u00e3o com n\u00famero incorreto de argumentos).<\/td><td>O <em>script<\/em> <strong>continua a execu\u00e7\u00e3o<\/strong>, mas pode gerar resultados inesperados.<\/td><\/tr><tr><td><strong>Notices<\/strong><\/td><td><code>E_NOTICE<\/code><\/td><td>Erros de <em>runtime<\/em> n\u00e3o cr\u00edticos (ex: usar uma vari\u00e1vel que n\u00e3o foi definida).<\/td><td>O <em>script<\/em> <strong>continua a execu\u00e7\u00e3o<\/strong>, servem para <em>debugging<\/em>.<\/td><\/tr><tr><td><strong>Parse Errors<\/strong><\/td><td><code>E_PARSE<\/code><\/td><td>Erros de sintaxe que impedem o <em>script<\/em> de ser lido (ex: ponto-e-v\u00edrgula faltando).<\/td><td>Interrompe a execu\u00e7\u00e3o antes de iniciar.<\/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\">Configura\u00e7\u00f5es de Relat\u00f3rio de Erros<\/h3>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Duas diretivas s\u00e3o cruciais para controlar a exibi\u00e7\u00e3o e o registro de erros:<\/p>\n\n\n\n<figure class=\"wp-block-table has-medium-font-size\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Diretiva<\/strong><\/td><td><strong>Descri\u00e7\u00e3o<\/strong><\/td><td><strong>Uso T\u00edpico<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong><code>error_reporting<\/code><\/strong><\/td><td>Define quais tipos de erros ser\u00e3o <strong>reportados<\/strong>.<\/td><td><strong>Desenvolvimento:<\/strong> <code>error_reporting(E_ALL);<\/code><\/td><\/tr><tr><td><strong><code>display_errors<\/code><\/strong><\/td><td>Define se os erros ser\u00e3o <strong>exibidos na tela<\/strong> para o usu\u00e1rio.<\/td><td><strong>Desenvolvimento:<\/strong> <code>ini_set('display_errors', 1);<\/code> <strong>Produ\u00e7\u00e3o:<\/strong> <code>ini_set('display_errors', 0);<\/code><\/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\/\/ Configura\u00e7\u00e3o ideal para AMBIENTE DE DESENVOLVIMENTO\nerror_reporting(E_ALL); \/\/ Reporta todos os erros, avisos e notices\nini_set('display_errors', 1); \/\/ Exibe os erros na tela\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. \ud83d\udee1\ufe0f Exce\u00e7\u00f5es: Tratamento Elegante (<code>try-catch<\/code>)<\/h2>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">As <strong>Exce\u00e7\u00f5es<\/strong> s\u00e3o objetos que representam uma falha ou condi\u00e7\u00e3o excepcional. Elas permitem que o c\u00f3digo de erro seja <strong>lan\u00e7ado<\/strong> (<code>throw<\/code>) e <strong>capturado<\/strong> (<code>catch<\/code>) de forma estruturada, isolando o tratamento de falhas da l\u00f3gica de neg\u00f3cio.<\/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\">Estrutura <code>try-catch<\/code><\/h3>\n\n\n\n<figure class=\"wp-block-table has-medium-font-size\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Bloco<\/strong><\/td><td><strong>Prop\u00f3sito<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong><code>try<\/code><\/strong><\/td><td>Envolve o c\u00f3digo onde o erro \u00e9 esperado. Se uma exce\u00e7\u00e3o for lan\u00e7ada, o <em>script<\/em> imediatamente salta para o bloco <code>catch<\/code>.<\/td><\/tr><tr><td><strong><code>catch<\/code><\/strong><\/td><td>Captura a exce\u00e7\u00e3o lan\u00e7ada (<code>Exception<\/code> ou uma classe que a herda) e executa o c\u00f3digo de tratamento (ex: logar o erro, exibir mensagem amig\u00e1vel).<\/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 Uso de Exce\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\nfunction dividir($numerador, $denominador) {\n    if ($denominador == 0) {\n        \/\/ Lan\u00e7a uma exce\u00e7\u00e3o do tipo Exception\n        throw new Exception(\"Divis\u00e3o por zero n\u00e3o permitida!\");\n    }\n    return $numerador \/ $denominador;\n}\n\ntry {\n    $resultado = dividir(10, 0); \/\/ Isso lan\u00e7ar\u00e1 a exce\u00e7\u00e3o\n} catch (Exception $e) {\n    \/\/ A exce\u00e7\u00e3o \u00e9 capturada aqui.\n    echo \"Erro capturado: \" . $e-&gt;getMessage(); \/\/ Sa\u00edda: Erro capturado: Divis\u00e3o por zero n\u00e3o permitida!\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\">Bloco <code>finally<\/code><\/h3>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">O bloco <code>finally<\/code> \u00e9 <strong>opcional<\/strong> e seu c\u00f3digo \u00e9 executado <strong>sempre<\/strong>, independentemente de uma exce\u00e7\u00e3o ter sido lan\u00e7ada ou capturada. \u00c9 ideal para tarefas de limpeza (ex: fechar conex\u00e3o com banco de dados ou arquivos).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PHP<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>try {\n    \/\/ ...\n} catch (Exception $e) {\n    \/\/ ...\n} finally {\n    echo \"Fim da opera\u00e7\u00e3o, recursos liberados.\";\n}\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\">Hierarquia de Exce\u00e7\u00f5es Personalizadas<\/h3>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Criar suas pr\u00f3prias classes de exce\u00e7\u00e3o (<code>class MinhaExcecao extends Exception {}<\/code>) permite que voc\u00ea capture e trate diferentes tipos de problemas de maneira mais espec\u00edfica. O PHP 7 introduziu a interface base <strong><code>Throwable<\/code><\/strong>, que \u00e9 a raiz de todos os <code>Error<\/code> (erros fatais) e <code>Exception<\/code> (erros de programa\u00e7\u00e3o).<\/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\">3. \u2705 Boas Pr\u00e1ticas para Tratamento de Erros<\/h2>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li class=\"has-medium-font-size\"><strong>Isolar o Risco:<\/strong> Use <code>try-catch<\/code> para envolver apenas o c\u00f3digo que voc\u00ea sabe que pode falhar (ex: opera\u00e7\u00f5es de I\/O, conex\u00f5es com banco de dados).<\/li>\n\n\n\n<li class=\"has-medium-font-size\"><strong>Logar, N\u00e3o Exibir em Produ\u00e7\u00e3o:<\/strong> Em ambientes de produ\u00e7\u00e3o, <strong>desative<\/strong> <code>display_errors<\/code>. Em vez disso, use <code>error_log<\/code> ou uma biblioteca dedicada para <strong>logar<\/strong> os detalhes t\u00e9cnicos do erro (stack trace) em um arquivo, para que a equipe de desenvolvimento possa analis\u00e1-los posteriormente.<\/li>\n\n\n\n<li class=\"has-medium-font-size\"><strong>Classes Customizadas:<\/strong> Use exce\u00e7\u00f5es personalizadas para categorizar falhas e ter blocos <code>catch<\/code> mais direcionados (ex: <code>catch (DatabaseException $e)<\/code>).<\/li>\n\n\n\n<li class=\"has-medium-font-size\"><strong>Capturar Erros Fatais (PHP 7+):<\/strong> O PHP 7+ permite capturar a maioria dos erros fatais (<code>E_ERROR<\/code>) usando <code>try...catch<\/code> via a interface <code>Throwable<\/code>.<\/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\">\u2705 Conclus\u00e3o Errors e Exceptions PHP<\/h2>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>Errors e Exceptions PHP<\/strong>: O tratamento de erros e exce\u00e7\u00f5es \u00e9 vital para a cria\u00e7\u00e3o de sistemas confi\u00e1veis. Enquanto a correta configura\u00e7\u00e3o de <strong><code>error_reporting<\/code><\/strong> e <strong><code>display_errors<\/code><\/strong> gerencia os erros tradicionais do PHP, o uso de <strong><code>try-catch-finally<\/code><\/strong> com a classe <strong><code>Exception<\/code><\/strong> (e suas classes personalizadas) \u00e9 o padr\u00e3o moderno e elegante para isolar, capturar e tratar falhas de forma organizada, garantindo a <strong>resili\u00eancia<\/strong> e a <strong>seguran\u00e7a<\/strong> de sua aplica\u00e7\u00e3o.<\/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>Errors e Exceptions PHP: O gerenciamento de erros e exce\u00e7\u00f5es \u00e9 crucial para a robustez&#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-1036","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 v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Errors e Exceptions PHP - BLOG THIAGO ROSSI<\/title>\n<meta name=\"description\" content=\"Errors e Exceptions PHP: Neste artigo, vamos explorar os diferentes tipos de erros, as configura\u00e7\u00f5es para control\u00e1-los e como utilizar ...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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