PHP Programming Principle Examples

<?php
    /* Pre-defined 'symbols' */
    /* ALL UPPER CASE - use underscore for linking nouns or words */
    define('COMPANY_NAME', 'Chris Baldy PLC');
    define('TELEPHONE_NUMBER', '0161 011 1001');

    /* Variable */
    /* Always start with $ - lower case for the first word, no spaces, starting word thereafter will
    always be upper-case first */
    $header = COMPANY_NAME . ' Call today on: ' . TELEPHONE_NUMBER; /* string type */

    echo $header;

    $header = 'This is not a header'; /* still a string */

    echo PHP_EOL . $header;

    $header = 22.44 * 22; /* number */

    echo PHP_EOL . $header;

    /* Variable types */
    /* integers - whole numbers */
    /* strings - collections of letters */
    /* floats - real number */
    /* objects - mixed types */
    /* arrays - mixed types */

    if(COMPANY_NAME === 'Chris Baldy PLC') {
        echo PHP_EOL . 'Best offers today - call now';


        echo PHP_EOL . 'Extra code';
    } else {

    }

    /* PHP maths */

    /* / - division */
    /* * - multiplication */


    echo PHP_EOL . 10 / 2;


    /* @see https://www.php.net/ */