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P H P Part I, By Kian

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Inscribed By: Kian  PHP & MySQL & Dreamweaver
PART I ,[object Object],[object Object]
Needed Installers ,[object Object],[object Object],[object Object],[object Object],[object Object]
PHP ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Important PHP Features ,[object Object],[object Object],[object Object],[object Object]
Important PHP Features ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
PHP-Apache Integration PHP Module PHP file Apache Web Server Web Browser Send page Request page HTML doc
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Where does PHP code go? Start PHP mode End PHP mode
Alternate Tags ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Variable Types ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Declaring Variables ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],$count = 0; $name = “David" ; $price = 45.50; $big_num = 1.2345E23; $success = TRUE;
Notes About Variables ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
More On Variables ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Naming Conventions ,[object Object],[object Object],[object Object],[object Object],[object Object]
Constants ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Examples ,[object Object],[object Object]
Three kinds of comments ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Literals & Strings ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Variable Interpolation ,[object Object],[object Object],[object Object],[object Object]
Variable Interpolation ,[object Object],[object Object],[object Object],[object Object],[object Object]
Displaying Strings ,[object Object],[object Object],[object Object],[object Object],[object Object]
Notes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Examples ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Arithmetical Operators ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Relational Operators (Logical Operators) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Comparison Operators ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Comparison of == and === ,[object Object],[object Object],[object Object],[object Object],[object Object]
Assignment Operators $a = $a % $b $a %= $b %= $a = $a / $b $a /= $b /= $a = $a * $b $a *= $b *= $a = $a - $b $a -= $b -= $a = $a . $b $a .= $b .= (for strings) $a = $a + $b $a += $b += (for numbers) $a = $b $a = $b = Equivalent Example Operator
Expression & Associativity & Evaluation Order ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Functions For Type Testing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Functions For Type Testing ,[object Object],[object Object],[object Object],[object Object]
Example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Conditional Statements ,[object Object],[object Object],[object Object],[object Object],[object Object],if (boolean expression 1) { ... } elseif (boolean expression 2) { ... } else { ... }
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
For Loop ,[object Object],[object Object],<?php $a = 0; $b = 0; for ($i=0; $i < 5; $i++;) { $a += 10; $b += 5; } echo (“At the end of the loop a=$a and b=$b !”); ?>
While ,[object Object],<?php $i=0; $num=50; while ($i < 10) { $sum--; $i++; } echo (“Loop stopped at $i</br> num is now $num !”); ?>
Switch ,[object Object],<?php $num = 2; switch ($num) { case 1: echo (“This is case 1 code!”); break ; case 2: echo (“This is case 2 code!”); break ; case 3: echo (“This is case 3 code!”); break ; default : echo (“This is default code!”); } ?>
[object Object],Math Functions <?php $radius = 1.0; $circ = 2.0 * M_PI * $radius ; $area = M_PI * $radius * $radius ; echo &quot;Circumference is $circ&quot; ; echo &quot;Area is $area&quot; ; ?>
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Math Functions
String Operations ,[object Object],[object Object],[object Object],[object Object]
String Operations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
String Comparison ,[object Object],[object Object],[object Object],[object Object],<?php $str1=‘99’;$str2=99; if ( $str1 === $str2 ) { echo &quot;Strings are equal ! &quot;; } else echo “Strings are not equal !”; ?>
Substrings & Replacement ,[object Object],[object Object],[object Object],[object Object],[object Object]
Examples of substr_replace ,[object Object],[object Object]
Exploding a String ,[object Object],[object Object],[object Object],<?php $data = &quot;foo:*:1023:1000::/home/foo:/bin/sh&quot;; list($user, $pass, $uid, $gid, $gecos, $home, $shell) = explode(&quot;:&quot;, $data); echo $user; // foo echo $pass; // * ?>
Imploding a String ,[object Object],[object Object],[object Object],<?php $array = array('lastname', 'email', 'phone'); $comma_separated = implode(&quot;,&quot;, $array); echo $comma_separated; // lastname,email,phone ?>
Two types of arrays ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],An array is a data structure that stores one or more values in a single value.
Indexed Arrays ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Indexed Arrays ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Examples ,[object Object],[object Object]
Associative Arrays ,[object Object],[object Object],$product  = array( 'id'  =>   123 ,  'desc'  =>   null ,  'price'  =>  549 .99 );
Associative Arrays ,[object Object],$age = array( 'Fred' => 37, 'Gord' => 23, 'Alice' => 17, 'Bob' => 23 ); echo &quot;Fred's age is &quot; , $age ['Fred']; $age [ 'Fred' ] = 65; // Fred is now a senior echo &quot;<br>Fred's age is {$age['Fred']}&quot; ; Note braces needed for interpolation
Sorting Arrays ,[object Object],[object Object],<?php $names = array ( 'Fred' , 'Ted' , 'Barney' , 'Gord' ); sort ($names); // 'Barney','Fred','Gord','Ted' rsort ($names); // 'Ted','Gord','Fred','Barney‘; ?>
Example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
User-defined Functions ,[object Object],function name ($ argument, $ argument ) { statement1; statement2; }
A max Function ,[object Object],function max2 ( $a , $b ) { $a=3; $b=1; if ( $a > $b ) return $a; return $b; } echo “Max of 2 and 3 is &quot; , max2 ( );
Reserved Words in PHP for E_ALL elseif class FALSE endwhile else cfunction extends endswitch echo( ) case exit( ) endif die( ) break eval endforeach do $argc E_WARNING endfor default as E_ERROR enddeclare declare $argv E_PARSE empty( ) continue and
Reserved Words in PHP print( ) not $HTTP_ENV_VARS PHP_VERSION new $HTTP_POST_FILES $PHP_SELF list( ) $HTTP_POST_VARS PHP_OS include_once( ) $HTTP_GET_VARS parent include( ) $HTTP_COOKIE_VARS or if global old_function $HTTP_SERVER_VARS function NULL $HTTP_COOKIE_VARS foreach
Reserved Words in PHP _wakeup TRUE _sleep $this _LINE_ stdclass _FILE_ switch while static virtual( ) return( ) xor require_once( ) var require( )
[object Object],[object Object]

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P H P Part I, By Kian

  • 1. Inscribed By: Kian  PHP & MySQL & Dreamweaver
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  • 7. PHP-Apache Integration PHP Module PHP file Apache Web Server Web Browser Send page Request page HTML doc
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  • 28. Assignment Operators $a = $a % $b $a %= $b %= $a = $a / $b $a /= $b /= $a = $a * $b $a *= $b *= $a = $a - $b $a -= $b -= $a = $a . $b $a .= $b .= (for strings) $a = $a + $b $a += $b += (for numbers) $a = $b $a = $b = Equivalent Example Operator
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  • 57. Reserved Words in PHP for E_ALL elseif class FALSE endwhile else cfunction extends endswitch echo( ) case exit( ) endif die( ) break eval endforeach do $argc E_WARNING endfor default as E_ERROR enddeclare declare $argv E_PARSE empty( ) continue and
  • 58. Reserved Words in PHP print( ) not $HTTP_ENV_VARS PHP_VERSION new $HTTP_POST_FILES $PHP_SELF list( ) $HTTP_POST_VARS PHP_OS include_once( ) $HTTP_GET_VARS parent include( ) $HTTP_COOKIE_VARS or if global old_function $HTTP_SERVER_VARS function NULL $HTTP_COOKIE_VARS foreach
  • 59. Reserved Words in PHP _wakeup TRUE _sleep $this _LINE_ stdclass _FILE_ switch while static virtual( ) return( ) xor require_once( ) var require( )
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