PHP code example of nixn / php-util

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

nixn / php-util example snippets

$array = ['a' => 'A', 'b' => 'B', 1 => 'one', 2 => 'two'];
Arr::pick($array, 'a', 2) // => ['a' => 'A', 2 => 'two']

$array = ['a' => 'A', 'b' => 'B', 1 => 'one', 2 => 'two'];
$predicate = fn($v, $k) => is_int($k) && $k % 2 == 0;
Arr::find_by($array, $predicate) // => 'two'
Arr::find_by($array, $predicate, true) // => 2

$array = ['a' => 'A', 'b' => 'B', 1 => 'one', 2 => 'two'];
$callback = fn($carry, $v, $k) => "$carry|$k";
Arr::reduce($array, $callback, "") // => "|a|b|1|2"

$array = ['a' => 'A', 'b' => 'B', 1 => 'one', 2 => 'two'];
Arr::kvjoin($array) // => "a=A, b=B, 1=one, 2=two"

$array = ['a' => 'A', 'b' => 'B', 1 => 'one', 2 => 'two'];
Arr::first($array) // => ['k' => 'a', 'v' => 'A']
Arr::first([]) // => ['k' => null, 'v' => null]

$array = ['a' => 'A', 'b' => 'B', 1 => 'one', 2 => 'two'];
Arr::find($array, 'b', 1) // => ['k' => 'b', 'v' => 'B']
Arr::find($array, 'c', 1) // => ['k' => 1, 'v' => 'one']
Arr::find($array, 'c', 3) // => ['k' => null, 'v' => null]

['k' => $key, 'v' => $value] = Arr::find($array, 2, 'b');
if ($key === null)
    echo "Not Found";
else
    echo "Found value $value with key $key";
// prints: Found value two with key 2

$comment_match = Partial::partial(preg_match(...), '/^\\s*(?:#|$)/');
$comment_match('# comment line') // => 1
$comment_match('normal line') // => 0

$keyword_match = Partial::partial(preg_match(...), '/php/i', Partial::PLACEHOLDER, null, 0, Partial::PLACEHOLDER);
$keyword_match('Only PHP makes this possible!', 0) // => 1
$keyword_match('Only PHP makes this possible!', 10) // => 0

$str = "abcdef";
Str::trim_prefix($str, 'abc') // => "def"
Str::trim_prefix($str, 'def') // => "abcdef"

$str = "abcdef";
Str::trim_suffix($str, 'abc') // => "abcdef"
Str::trim_suffix($str, 'def') // => "abc"

Util::identity(42) // => 42

$parenthesize = fn($x) => "($x)";
Util::map(0, $parenthesize) // => "(0)"
Util::map(0, $parenthesize, zero: true) // => 0
Util::map(0, $parenthesize, null_on_not: true, zero: true) // => null
Util::map(42, null, func: true) // => 42
Util::map(42, null, null_on_not: true, func: true) // => null

$parenthesize = fn($x) => "($x)";
Util::map_nots(42, $parenthesize, false, false, 42) // => 42
Util::map_nots(42, $parenthesize, true, false, 42) // => null
Util::map_nots(null, $parenthesize, true, false, 42) // => "()"

$parenthesize = fn($x) => "($x)";
Util::when(false, rand(...), $parenthesize) // => null (rand() not executed)
Util::when(true, rand(...), $parenthesize) // => "(42)"
Util::when(9, sqrt(...)) // => 3 (same as Util::map(9, sqrt(...)) or even just sqrt(9))
Util::when($get_from_database, fn() => $db->get(), fn($result) => $result->deep_value()) // the natural use case of this
Util::when($use_title, fn() => ['title', $this->title], Hiccup::html(...)) // the natural use case for this
Util::when(get_title(), fn($title) => ['title', $title], Hiccup::html(...), empty: true)

$leaf = new Node('c', parent: new Node('b', parent: new Node('a')));
foreach (Util::tree_path($leaf, fn($node) => $node->parent) as $node)
    echo "$node->name,";
// prints: a,b,c,
foreach (Util::tree_path($leaf, fn($node) => $node->parent, fn($node) => $node->name !== 'a') as $node)
    echo "$node->name,";
// prints: b,c,

$new_color = Util::new(Color::class);
$color = $new_color(0, 127, 255); // $color instanceof Color

echo (new Pipe('NOW')) // wrap initial value
(strtolower(...)) // map through strtolower() => 'now'
->new(DateTimeImmutable::class, Pipe::PLACEHOLDER, DateTimeZone::UTC) // create class
->format("Y_m_d") // call 'format' method magically => '2025_01_01' (that was 'now' not long ago...)
(str_replace(...), '_', '-') // => '2025-01-01'
(explode(...), '-', Pipe::PLACEHOLDER, 2) // => ['2025', '01-01']
->get(0) // => '2025'
(intval(...)) // => 2025
(fn($x) => $x + 1) // => 2026
->value; // unwrap => 2026
// prints: 2026

With::new(mysqli::class, 'localhost', 'db_user', 'db_password')
->set_charset('utf8mb4')
->select_db('log')
->autocommit(false)
->begin_transaction()
->execute_query('INSERT INTO ping')
->execute_query('INSERT INTO pong')
->commit()
->close();

$mysql = With::new(mysqli::class, 'localhost', 'db_user', 'db_password')
->set_charset('utf8mb4')
->select_db('log')
->autocommit(false)
->object; // unwrap