{"id":14121,"date":"2022-09-19T09:32:31","date_gmt":"2022-09-19T09:32:31","guid":{"rendered":"https:\/\/www.exakat.io\/?page_id=14121"},"modified":"2022-09-19T09:46:18","modified_gmt":"2022-09-19T09:46:18","slug":"phptip-tweets","status":"publish","type":"page","link":"https:\/\/www.exakat.io\/ex\/phptip-tweets\/","title":{"rendered":"PHPtip tweets"},"content":{"rendered":"

PHP tips<\/h1>\n

A pot-pourri of 8 PHP tips that were published with @exakat<\/a> account.<\/p>\n

\n

strict_types exceptions<\/h2>\n

strict_types do not apply to #PHP operators, only on to typed structures. <\/p>\n

Here, concatenation and interpolation all call __toString(), but not foo(). <\/p>\n

As you can see, print() and echo() are safe too, while implode() is not. <\/p>\n


\nTweet<\/a>\n<\/p>\n

\n

__invoke() and properties and methods<\/h2>\n

What does this tricky #PHP code displays?
\n
\nTweet<\/a>\n<\/p>\n

\n

Method syntax and __invoke()<\/h2>\n

There are some other cases around instanceof, which are surprising upon first read. <\/p>\n

We can use a string in a variable, but not a direct string, a constant nor a ::class.
\n
\nTweet<\/a>\n<\/p>\n

\n

object is not a type<\/h2>\n

Such situations always make me smile, yet I am certain several of us will loose time on such a mistake.
\n
\nTweet<\/a>\n<\/p>\n

\n

PHP keywords and namespaces<\/h2>\n

I was today’s old when I realized that #PHP keyword are allowed in namespaces name since #PHP 8.0.<\/p>\n

This goes to PHP 8.0 Compatibility ruleset.
\n
\nTweet<\/a>\n<\/p>\n

\n

PHP silent optimisation<\/h2>\n

PHP optimisation in action : undefined variables are only reported when they are used. <\/p>\n

first is omitted : no operation
\nsecond is skipped : no need to execute 2nd term
\nthird is reporting a warning. <\/p>\n


\nTweet<\/a>\n<\/p>\n

\n

PHP recycles<\/h2>\n

TIL PHP recycles the previously created stdClass objects. The following code returns Object #1, until it is stored in $b. <\/p>\n

TIL (2) : PHP’s stdClass’s constructor omits all its arguments. <\/p>\n


\nTweet<\/a>\n<\/p>\n

\n

When integer overflows<\/h2>\n

Mathematics have the ‘Ramanujan Summation’, where the sum of all integers is -1\/12. <\/p>\n

#PHP has the integer overflow. Stay away from the PHP_INT_MAX limits. Valid with (int) or intval() with recent #PHP versions. <\/p>\n


\nTweet<\/a>\n<\/p>\n

\n","protected":false},"excerpt":{"rendered":"

PHP tips A pot-pourri of 8 PHP tips that were published with @exakat account. strict_types exceptions strict_types do not apply to #PHP operators, only on to typed structures. Here, concatenation and interpolation all call __toString(), but not foo(). As you can see, print() and echo() are safe too, while implode() is not. Tweet __invoke() and […]\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-14121","page","type-page","status-publish","hentry"],"yoast_head":"\nPHPtip tweets - Exakat<\/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:\/\/www.exakat.io\/ex\/phptip-tweets\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PHPtip tweets - Exakat\" \/>\n<meta property=\"og:description\" content=\"PHP tips A pot-pourri of 8 PHP tips that were published with @exakat account. strict_types exceptions strict_types do not apply to #PHP operators, only on to typed structures. Here, concatenation and interpolation all call __toString(), but not foo(). 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