php string variable code example

Example 1: set php var to html

<?php ob_start();?>
<div>Contents goes <b>here</b></div>
<?php $contents=ob_get_clean();?>

Example 2: php variables

<?php
  $string = 'string';
  $number = 1;
?>

Example 3: php variable in string

$a = '12345';

// This works:
echo "qwe{$a}rty"; // qwe12345rty, using braces
echo "qwe" . $a . "rty"; // qwe12345rty, concatenation used

// Does not work:
echo 'qwe{$a}rty'; // qwe{$a}rty, single quotes are not parsed
echo "qwe$arty"; // qwe, because $a became $arty, which is undefined

Example 4: php variables

<?php
    //can also use print instead of echo and would return  but it is
    //slower so use echo mainly
    #variable rules
    /*
        - Prefix with a dollar sign $
        - Start with a letter or an underscore only
        - Only letters, numbers and underscores
        - Case sensative
    */

    #DATA TYPES
    /*
        Strings
        Integers 4
        floats 4.4
        Booleans True or Flase
        Arrays
        Objects
        Null
        Resources 
    */
    $output = '  Hello there Bob!!';
    $num1 = 4;
    $num2 =10;
    $sum = $num1 + $num2;
    $string1 = '  Hello';
    $string2 = 'Bobby!!';
    $greeting = $string1 .' '. $string2;
    $greeting2 = "$string1 $string2";

    $string3 = ' They\'re Here';

    #making a constant

    define('GREETING', ' Hello Everyone!!');

    echo $sum;
    echo $output;
    echo $greeting;
    echo $greeting2;
    echo $string3;
    echo GREETING;
?>

Example 5: php variable

$name = "Josh"; //$varname = value

Example 6: PHP Variable in String

phpCopy# php 7.*
<?php
$txt = "salt";
echo "{$txt}y";
?>