{"id":240,"date":"2024-12-13T11:27:45","date_gmt":"2024-12-13T14:27:45","guid":{"rendered":"https:\/\/geekblogti.wpengine.com\/?p=240"},"modified":"2024-12-19T13:00:46","modified_gmt":"2024-12-19T16:00:46","slug":"conheca-as-7-maiores-mudancas-do-php-7","status":"publish","type":"post","link":"https:\/\/www.geekhunter.com/pt/blog\/conheca-as-7-maiores-mudancas-do-php-7\/","title":{"rendered":"Conhe\u00e7a as 7 maiores mudan\u00e7as do PHP 7"},"content":{"rendered":"\n

O mundo da tecnologia \u00e9 mais din\u00e2mico do que parece, ou seja, qualquer coisa ou pessoa que fique muito tempo sem se atualizar pode perder espa\u00e7o \u2014 e o PHP finalmente est\u00e1 correndo atr\u00e1s para corrigir suas falhas nesse quesito. Dez anos depois de sua \u00faltima grande atualiza\u00e7\u00e3o, o PHP 7 chega com v\u00e1rias novidades para alegrar e facilitar a vida dos programadores web.<\/span><\/p>\n\n\n\n

Confira as 7 maiores mudan\u00e7as do PHP 7 em rela\u00e7\u00e3o \u00e0s suas vers\u00f5es anteriores e o que voc\u00ea pode esperar da linguagem a partir de agora:<\/span><\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

1. Aumento incr\u00edvel de desempenho<\/b><\/h2>\n\n\n\n

Talvez seja a novidade que mais salta aos olhos de todos que j\u00e1 experimentaram o PHP 7. Como todo seu motor foi remodelado, o que j\u00e1 foi poss\u00edvel constatar \u00e9 uma melhor performance e uma melhor aloca\u00e7\u00e3o de mem\u00f3ria. Dependendo da plataforma, o sistema chega a rodar nove vezes mais r\u00e1pido do que no PHP 5! Um infogr\u00e1fico da Zend <\/a>mostra que h\u00e1 ganhos significativos mesmo em CMS mais robustos, como Magento (at\u00e9 3x mais requisi\u00e7\u00f5es por segundo) ou WordPress (2x mais), o que mantem a linguagem no topo da lista das mais r\u00e1pidas para web.<\/span><\/p>\n\n\n\n

2. Tratamento de erros fatais como exce\u00e7\u00f5es<\/b><\/h2>\n\n\n\n

O comportamento de erros fatais no PHP sempre foi bem distinto: o sistema trava e impede qualquer carregamento na p\u00e1gina, um verdadeiro caos para aplica\u00e7\u00f5es em produ\u00e7\u00e3o. Agora, com o PHP 7, \u00e9 poss\u00edvel considerar esses erros como exce\u00e7\u00f5es e trat\u00e1-los no c\u00f3digo, com um bloco try comum. Mais controle e seguran\u00e7a do que antes, com a possibilidade de desenvolver aplica\u00e7\u00f5es \u2018fail gracefully\u2019, sem grandes impactos para o usu\u00e1rio. <\/span><\/p>\n\n\n\n

3. Novos operadores<\/b><\/h2>\n\n\n\n

Essa novidade \u00e9 boa para aqueles que gostam de poupar caracteres em seus c\u00f3digos. O PHP 7 traz dois novos (e \u00fateis) operadores l\u00f3gicos: o \u201cspaceship\u201d (<=>), que \u00e9 capaz de comparar dois valores e dizer qual deles \u00e9 maior (incluindo strings e arrays); e o \u201cnull coalescing\u201d (??), que verifica a exist\u00eancia de determinada vari\u00e1vel sem usar o famoso m\u00e9todo \u201cisset\u201d. Agora voc\u00ea tamb\u00e9m pode usar o define() para declara\u00e7\u00e3o de arrays constantes e outras opera\u00e7\u00f5es como importar m\u00faltiplas classes e fun\u00e7\u00f5es com \u2018use\u2019 agora podem ser agrupadas e realizadas com uma \u00fanica linha de c\u00f3digo.<\/span><\/p>\n\n\n\n

>>Leitura Recomendada:<\/em><\/strong>
IDE para PHP <\/em><\/strong><\/a>e JS: qual a ideal?<\/em><\/p>\n\n\n\n

4. Indu\u00e7\u00e3o de tipos em vari\u00e1veis e fun\u00e7\u00f5es<\/b><\/h2>\n\n\n\n

Depois de muito tempo, o PHP come\u00e7a a receber um suporte mais s\u00f3lido \u00e0 indu\u00e7\u00e3o de tipos, mesmo que ainda seja bem pouco. Com a s\u00e9tima vers\u00e3o, \u00e9 poss\u00edvel criar vari\u00e1veis dos tipos \u201cint\u201d, \u201cfloat\u201d, \u201cstring\u201d e \u201cbool\u201d, al\u00e9m de us\u00e1-los para indicar qual tipo de valor uma determinada fun\u00e7\u00e3o retornar\u00e1. Os seus c\u00f3digos agradecem!<\/span><\/p>\n\n\n\n

5. Classes an\u00f4nimas<\/b><\/h2>\n\n\n\n

Assim como as fun\u00e7\u00f5es an\u00f4nimas, o PHP 7 permite a cria\u00e7\u00e3o de classes an\u00f4nimas, ou seja, \u00e9 poss\u00edvel agora criar classes que n\u00e3o precisam ter um identificador espec\u00edfico, al\u00e9m de poderem ser retorno de fun\u00e7\u00f5es, quando necess\u00e1rio. A mudan\u00e7a permite a cria\u00e7\u00e3o de classes e fun\u00e7\u00f5es inline, uma grande aliada nos testes unit\u00e1rios.<\/span><\/p>\n\n\n\n

6. Suporte ao Unicode<\/b><\/h2>\n\n\n\n

Superando a grande pedra do sapato da cancelada vers\u00e3o 6 da linguagem, o PHP 7 finalmente \u00e9 capaz de entender e converter valores Unicode para seus respectivos caracteres a partir de seus c\u00f3digos hexadecimais em comandos de sa\u00edda como \u201cecho\u201d. Uma \u00f3tima not\u00edcia para aqueles que procuravam m\u00e9todos alternativos para isso h\u00e1 tempos.<\/span><\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

7.Retirada de fun\u00e7\u00f5es<\/b><\/h2>\n\n\n\n

Algumas fun\u00e7\u00f5es j\u00e1 consideradas obsoletas por boa parte dos usu\u00e1rios finalmente deram adeus no PHP 7. Todo o conjunto \u201cmysql_\u201d, que tratava da intera\u00e7\u00e3o com bancos de dados MySQL, n\u00e3o existem mais dentro da linguagem, assim como as \u201cereg_\u201d, que gerenciavam a busca a partir de express\u00f5es regulares. Grande parte das funcionalidades do primeiro conjunto est\u00e3o presentes na mysqli_, enquanto usu\u00e1rios de fun\u00e7\u00f5es ereg_ provavelmente provavelmente v\u00e3o querer migrar para a biblioteca PCRE, com o prefixo preg_.<\/span><\/p>\n\n\n\n

Preocupado com as altera\u00e7\u00f5es? A <\/span>Umbler<\/span><\/a> preparou um apanhado das fun\u00e7\u00f5es removidas e alternativas para obter as mesmas funcionalidades, vale a pena conferir e j\u00e1 se adaptar para novas aplica\u00e7\u00f5es. Se voc\u00ea possui um sistema que roda nas vers\u00f5es anteriores, uma dica \u00e9 o <\/span>PHP 7 Compatibility Checker<\/span><\/a>, que permite varrer a aplica\u00e7\u00e3o e verificar erros e warnings na nova vers\u00e3o do sistema e migrar com mais seguran\u00e7a e confiabilidade.<\/span><\/p>\n\n\n\n

Ainda n\u00e3o iniciou na linguagem? A <\/span>Geekhunter<\/span><\/a> \u00e9 parceira da <\/span>Udemy<\/a> e oferece descontos em diversos cursos, inclusive PHP, \u00e9 s\u00f3 <\/span>Udemy<\/a> e come\u00e7ar a desenvolver suas aplica\u00e7\u00f5es. Voc\u00ea tamb\u00e9m pode ver “8 erros de CSS que voc\u00ea n\u00e3o pode cometer<\/a>“. <\/span><\/p>\n\n\n\n

Deixe seus coment\u00e1rios e mostre quais recursos voc\u00ea ainda espera para as pr\u00f3ximas vers\u00f5es da linguagem.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

Entenda quais foram as maiores mudan\u00e7as que vieram neste lan\u00e7amento do PHP 7. Veja o que melhorou e o que foi retirado nesta nova vers\u00e3o.<\/p>\n","protected":false},"author":167,"featured_media":5648,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[18],"tags":[],"class_list":["post-240","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-desenvolvimiento-de-software"],"acf":[],"yoast_head":"\nConhe\u00e7a as 7 maiores mudan\u00e7as do PHP 7 - Blog Geekhunter<\/title>\n<meta name=\"description\" content=\"O PHP 7 chegou e junto com ele mudan\u00e7as bem significativas. Quais foram as maiores mudan\u00e7as do PHP 7? N\u00f3s fizemos um levantamento. 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