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Example code of 1tomany/nullify

Informations about the package nullify

String Nullifier for PHP

This simple library exposes a single function named nullify() in the global namespace. By default, the function trims the string passed into it and returns null if the trimmed value is an empty string, or the trimmed string otherwise.

Installation

Usage

The nullify() function has the following signature:

If the $trim argument is set to false, the string is not trimmed. An empty string will still return null, otherwise, the original string is returned. If an object implementing \Stringable is passed in, the object will be converted to a string first.

Purpose

Dealing with falsy and empty values in PHP has always been a challenge. If you've used the language long enough, you've probably been bitten by empty('0') returning true even though the string '0' clearly isn't empty. My preference is to typehint strings as non-empty-string|null to clearly indicate what kinds of values that variable holds.

Take the following basic DTO as an example:

Because of the ambiguity of the $name property, it's cumbersome to determine if it is empty or not:

For all practical purposes, $name is empty, but determining that is cumbersome.

A much clearer DTO would be written like this:

It's immediately clear what data $name holds, and testing if $name is empty or not is a cinch:

These are also clear because nullify() has removed any ambiguity around falsy or empty values:

Examples

$string $trim nullify()
null true null
'' true null
'' false null
' ' true null
' ' false ' '
'0' true '0'
'0' false '0'
' 0 ' true '0'
' 0 ' false ' 0 '
' PHP ' true 'PHP'
' PHP ' false ' PHP '
' 🐘🎉 ' true '🐘🎉'

Credits

License

The MIT License

All versions of nullify with dependencies

PHP Build Version
Package Version
Requires php Version >=8.4
ext-mbstring Version *
symfony/string Version ^7.4|^8.0|^8.1
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