TIL that #PHP has a dedicated function to calculate exp($x) - 1.

You can save quite some typing by using expm1($x);

It means exponential minus one.

#phptip #phptrick

https://3v4l.org/GCQX4

One of my favorite math joke is to tell people that 'Some infinites are larger than others' (Which is true, see https://cantorsparadise.com/why-some-infinities-are-larger-than-others-fc26863b872f).

At the same time, in #PHP, infinite is accessible to anyone.

#phptip #phptrick @fredbouchery

I just watched a conference, where the speaker complained that, for no good reason, #PHP concatenation operator is comma ','

This is definitely not the most popular concatenation operator, yet it kinda happens in one situation. Can you name it?

#phptip #phptrick

Since #PHP 7.4, there are numeric separators, to make numbers more readable.

They are only for hard-coded literals, so what do you do if you have stored them in a string ? 😇

https://www.php.net/manual/en/language.types.integer.php#language.types.integer.syntax

#phptip #phptrick

Here is a case where the difference between a #PHP constant and a name (class, function, method...) is fuzzy.

There is, at least, another case. Which one?

https://3v4l.org/fMmaU

#phptip #phptrick

With #PHP 8.1, it is possible to add (...) (parenthesis, three dots, parenthesis) as you like, between the method name and the arguments. This is fun!

The last command is also possible, but requires a bit of brain twisting. How to make it work?

#phptip #phptrick

This is a reminder that #PHP only use int and strings as keys in array. Null is a special case here.

#phptip #phptrick

#PHP allows to call any method statically, when within the same class. Here, self::foo() is a valid call (don't try this outside the same class...).

This is needed to call parent:: methods, without $this.

Question : what does $this contains in the method foo(), called statically ?
The object or null ?

#phptip #phptrick

TIL that #PHP also supports attributes with enum, interfaces, traits and enum's cases.

#phptrick #phptip

https://3v4l.org/VO82i

https://kirschbaumdevelopment.com/insights/extending-php-enums-with-attributes

Today, I realized that the short assignment operators are the bitwise type, not the logical ones.

This is a 0, while I expected true.

There is not ||= nor &&= operator.

Could I ask for one in #PHP 8.3?

#phptip #phptrick

https://www.php.net/manual/en/language.operators.assignment.php

Useless #PHP knowledge of the sunday afternoon :

'enum' is a valid name for enums and classes : legacy reasons.

Here, enum fails because the name is already taken by the class, even if defined later.

#phptip #phptrick

#PHP foo() and goo() are both misusing generators.

Well, most probably, in any case.

#phptip #phptrick

Sunday #PHP puzzle :

How can you make foreach() emits several times the same key ?

#phptip #phptrick

Multiple solutions possible : please, submit one only.

How to remove a value in a #PHP array, six methods.

#phptip #phptrick

https://www.exakat.io/en/removing-a-value-in-an-array-six-methods/

Yesterday, I learnt that #PHP generators can also be used directly with the ellipsis operator.

Yield are collected in an array, and then spread.

This syntax ignores return statements. If you don't need the spread, use iterator_to_array().

#phptip #phptrick

[Repost du blog]
exakat, static analysis for PHP (@exakat) #phptip #phptrick
https://warriordudimanche.net/article1807/6400ff22c835d
On en apprend tous les jours...
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https://lehollandaisvolant.net/?id=20230302173804

#astuce #CodeDeveloppement #php

RT @Exakat
#phptip #phptrick
Avoid long list of /../../../ by leveraging the dirname() second argument.

https://www.php.net/dirname

#PHP preg_match_all() is faster without the 3rd $matches argument, and then, it can be replaced by preg_match(), with another speed bump.

#phptip #phptrick

#PHP : here are some irreconciliable differences between is_a() and instanceof.

#phptip #phptrick

For some reason, instanceof doesn't accept the :: operator : nor static method, nor class constants : only static properties.

https://3v4l.org/OEpgo

#PHP allows almost all keywords as method name.

SCA hate them.

#phptip #phptrick