dseguy, 7 months ago to random French

Choose your team : condition in a loop, or array_filter() first ?

Make up your mind, and then you can read this new blog post.

The result will NOT surprise you.

https://www.exakat.io/en/array_filter-versus-loop-condition-checks/

#phptip #phptrick

dseguy, 7 months ago (edited 7 months ago) to php French

#PHP Friday Heart Attack :

What does this code will display ?

#phptip #phptrick 😜

dseguy, 7 months ago to php French

Cunning Little Switch : classic improvements to writing the old and simple switch in #PHP.

Some are errors, others are tips : all are worth keeping in mind.

#phptip #phptrick

https://www.exakat.io/en/well-structured-switch-command-in-php/

dseguy, 7 months ago (edited 7 months ago) to php

What is this piece of code will display in #PHP 8.2 ?

<?php

enum x: string {
case B = 'b';
const C = 'c';
}

class x2 {
const E = x::B->value;
const F = x::C + [];
}

echo x2::E;
?>

#phptip #phptrick

b_viguier, 7 months ago to php French

A small #PHP trick, combining named parameters, spread and union arrays operators to « easily » create a modified copy of a DTO: https://3v4l.org/ZWX5G#v8.2.10

⚠️ It’s fun if you have a lot of parameters, but using a string containing the parameter’s name isn’t really satisfactory 😕

dseguy, 8 months ago to random French

Customs exceptions are classes like any others: they may implements an interface.

That interface may be used to catch the exception, even if the interface has nothing to do with exceptions.

#phptip #phptrick

dseguy, 8 months ago to php French

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

dseguy, 8 months ago to php French

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

dseguy, 8 months ago to php French

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

dseguy, 9 months ago (edited 9 months ago) to php French

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

dseguy, 9 months ago to php French

I always wondered why #PHP allows to NOT a variable on the LEFT side of an assignation.

It makes sense with an iffectation (an assignation in an if)

I'm sure other such expressions are possible, with unary operators.

Definitely not for me, for readability reasons; same as !$o instanceof X.

#phptip #phptrick

https://3v4l.org/3tfWb

dseguy, 9 months ago to php French

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

dseguy, 9 months ago to random French

If you forgot in which PHP version a feature was introduced, https://caniphp.com/ did not forget so you can check it there.

#phptip #phptrick

dseguy, 10 months ago to php French

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

dseguy, 10 months ago to php French

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

#phptip #phptrick

dseguy, 11 months ago to php French

#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

dseguy, 11 months ago to php French

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

dseguy, 1 year ago to php French

Sunday #PHP puzzle :

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

#phptip #phptrick

Multiple solutions possible : please, submit one only.