PHP examples

examples.php

<?php

// ARRAYS
$array = [1,2,3,4,5,6];

// we need to use count function to get array length
$arrayLength = count($array);

// we need to combine 2 functions to get reversed array with elements multiplied by 2
$multipliedArrayReversed = array_reverse(array_map(fn(int $value): int => $value * 2, $array));

// take a look at filtering - array_filter has reversed function arguments compared to array_map
$oddsOnly = array_filter($array, fn(int $value): bool => $value & 1);

// STRINGS
$string = "Hello World";

// To get only second word of the sentence we can use 2 ways (there are more, but here are 2 examples)
$onlySecondWord = substr($string, strpos($string, ' ') + 1);
// OR
$onlySecondWord = explode(' ', $string)[1];

// another function to reverse the string
$reversedString = strrev($string);

// to check if the string starts with another string we use str_starts_with
$startsWithHell = str_starts_with($string, "Hell");

// but if we want to check if string contains another string arguments are in reversed order
$containsHell = str_contains("Hell", $string);