Chapter 3 files

3/example3-1.php

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+<?php
+  echo "Hello world";
+?>
+

3/example3-10.php

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+<?php
+  $number = 12345 * 67890;
+  echo substr($number, 3, 1);
+?>

3/example3-11.php

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+<?php
+  $pi     = "3.1415927";
+  $radius = 5;
+  echo $pi * ($radius * $radius);
+?>

3/example3-12.php

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+<?php
+  function longdate($timestamp)
+  {
+    return date("l F jS Y", $timestamp);
+  }
+?>

3/example3-13.php

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+<?php
+  function longdate($timestamp)
+  {
+    $temp = date("l F jS Y", $timestamp);
+    return "The date is $temp";
+  }
+?>

3/example3-14.php

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+<?php
+  $temp = "The date is ";
+  echo longdate(time());
+
+  function longdate($timestamp)
+  {
+    return $temp . date("l F jS Y", $timestamp);
+  }
+?>

3/example3-15.php

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+<?php
+  $temp = "The date is ";
+  echo $temp . longdate(time());
+
+  function longdate($timestamp)
+  {
+    return date("l F jS Y", $timestamp);
+  }
+?>

3/example3-16.php

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+<?php
+  $temp = "The date is ";
+  echo longdate($temp, time());
+
+  function longdate($text, $timestamp)
+  {
+    return $text . date("l F jS Y", $timestamp);
+  }
+?>

3/example3-17.php

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+<?php
+
+  echo test();
+  echo "<br><br>";
+  echo test();
+    
+  function test()
+  {
+    static $count = 0;
+    echo $count;
+    $count++;
+  }
+?>

3/example3-18.php

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+<?php
+  static $int = 0;         // Allowed 
+  static $int = 1+2;       // Disallowed (will produce a Parse error)
+  static $int = sqrt(144); // Disallowed
+?>

3/example3-2.php

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+<?php
+/* This is a section
+   of multi-line comments
+   which will not be
+   interpreted */
+?>

3/example3-3.php

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+<?php
+  $mycounter = 1;
+  $mystring  = "Hello";
+  $myarray   = array("One", "Two", "Three");
+?>

3/example3-4.php

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+<?php // test1.php
+  $username = "Fred Smith";
+  echo $username;
+  echo "<br>";
+  $current_user = $username;
+  echo $current_user;
+?>

3/example3-5.php

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+<?php
+  $oxo = array(array('x', ' ', 'o'),
+               array('o', 'o', 'x'),
+               array('x', 'o', ' '));
+  
+  echo $oxo[1][2];
+?>

3/example3-6.php

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+<?php
+  $author = "Steve Ballmer";
+
+  echo "Developers, Developers, developers, developers, developers,
+  developers, developers, developers, developers!
+
+  - $author.";
+?>

3/example3-7.php

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+<?php
+  $author = "Bill Gates";
+
+  $text = "Measuring programming progress by lines of code is like
+  Measuring aircraft building progress by weight.
+
+  - $author.";
+
+  echo $text;
+?>

3/example3-8.php

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+<?php
+  $author = "Brian W. Kernighan";
+
+  echo <<<_END
+  Debugging is twice as hard as writing the code in the first place.
+  Therefore, if you write the code as cleverly as possible, you are,
+  by definition, not smart enough to debug it.
+  
+  - $author.
+_END;
+?>

3/example3-9.php

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+<?php
+  $author = "Scott Adams";
+
+  $out = <<<_END
+  Normal people believe that if it ain’t broke, don’t fix it.
+  Engineers believe that if it ain’t broke, it doesn’t have enough
+  features yet.
+
+  - $author.
+_END;
+?>