128 lines
2.6 KiB
PHP
128 lines
2.6 KiB
PHP
<?php
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// Přepisování proměnných (statické a dynamické typování)
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$name = "Lukáš";
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$adult = true;
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echo $name;
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echo "<br>";
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// Pravda, nepravda = true, false
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$kolej = false;
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$adult = false;
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$is_logged = true;
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$database_connection = false;
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echo "Přihlášení uživatele: $is_logged";
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echo "<br>";
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echo "Napojení do databáze: $database_connection";
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// Null
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$kolej = null;
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echo $kolej;
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$kolej = "Nebelvír";
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echo $kolej;
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// Matematické operace
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$students_2022 = 100;
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$students_2023 = 124;
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$results = $students_2022 - $students_2023 * 5;
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$results2 = $students_2022 + $students_2023;
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$results3 = $students_2022 * $students_2023 ;
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$results4 = $students_2022 / $students_2023;
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echo "Výsledek: $results";
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echo "<br>";
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echo "Výsledek: $results2";
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echo "<br>";
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echo "Výsledek: $results3";
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echo "<br>";
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echo "Výsledek: $results4";
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// Spojování proměnných
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$first_name = "Harry";
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$second_name = "Potter";
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$friend_first_name = "Ron";
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echo $first_name . " " . $second_name;
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echo "<br>";
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echo $first_name. " a " .$friend_first_name;
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// Type conversion
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$year_price = "1500";
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$year_caunt = "7";
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$results_price = $year_price * $year_caunt;
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echo $results_price;
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echo "<br>";
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var_dump($results_price);
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echo "<br>";
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var_dump($year_caunt);
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// Negace
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$database_connection1 = true;
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var_dump(!$database_connection1);
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// Pole (array)
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$students = ["Harry", "Ron", "Hermiona"];
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$students2 = [1 => "Harry", 65 => "Ron", "Hermiona"];
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echo $students[1];
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echo "<br>";
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var_dump($students);
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echo "<br>";
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var_dump($students2);
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// Asociatvní pole
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$students3 = [
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"first_name" => "Harry",
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"second_name" => "Potter",
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"college" => "Nebelvír",
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"age" => 15
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];
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echo $students3["second_name"];
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// Dvoudimenzionální pole (pole v poli)
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$students4 = [
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[
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"first_name" => "Harry",
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"second_name" => "Potter",
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"age" => 15
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],
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["first_name" => "Hermiona",
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"second_name" => "Grangerová",
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"age" => 14
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],
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["first_name" => "Ron",
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"second_name" => "Weasly",
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"age" => 15],
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];
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var_dump($students4);
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echo "<br>";
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echo $students4[0]["first_name"];
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echo "<br>";
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echo $students4[2]["second_name"];
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// Foreach cyklus
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$students5 = ["Harry", "Ron", "Hermiona", "Malfoy"];
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foreach ($students5 as $index => $one_student5) {
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$index++;
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echo $index.". " . $one_student5;
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echo "<br>";
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// Foreach cyklus
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$students6 = [
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"jmeno" => "Harry",
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"prijmeni" => "Potter",
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"kolej" => "Nebelvír",
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"vek" => 15
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];
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foreach ($students6 as $index1 => $one_information) {
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echo $index1.": ".$one_information;
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echo "<br>";
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};
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} |