PHP Quiz part 1

First a cast, then an increment, but what is shown?

<?php
  // What number will you get to see?
  $integer = (int) 'PHP';
  echo ++$integer;

Float boat

 <?php
        // What number will be output?
        $a = 0.1 + 0.7;
        echo (int) ($a*10) + 1 ;

Array key fun

 <?php

        $a[ 1 ] = "The one";
        $a["a"] = "The second";
        $a["1"] = "The who?";
        $a["A"] = "CaSe FuN";
        $a["01"]= "The last";

        echo count($a); // How many do you expect?

Array count

 <?php

        $one    = range(1, 3);
        $two    = 7;
        echo count($one) + count($two); // How much will the be?

Array key existence

 <?php

        // Will it be isset?

        $a              = range(10,20);
        $a[11]          = "The one and only";
        $a['11']        = null;

        unset($a[1]);
        if (isset($a[11])) {
                echo "Yes, it's isset!";
        } else {
                echo "No, it's not isset.";
        }

Array evil sort

 <?php

        $a      = array(0, 1, 0.1=>'a', 1.1=>'A');
        sort($a);

        echo count($a); // Is it what you expected?

Array reference voodoo

<?php

        $a = array('i','b','b','q','b','!');
        foreach($a as &$value)  {}
        foreach($a as $value)   {}

        echo    str_rot13( implode('', $a) ); // how many letters ?