ASP (VBScript)

PHP (v4.3+)

ASP Comments, inline

'my dog has fleas

PHP Comments, inline

//my dog has fleas

ASP Comments, block


not available?

PHP Comments, block

/*
  The quick brown fox
  jumped over the lazy dogs.
*/

ASP, Escaping quotes

""

"var text1=""<img src=\""blank.gif\"">"";"

PHP, Escaping quotes

\" or use ' like javascript

'var text1="<img src=\"blank.gif\">";';

ASP Command termination

None, but : can be used to separate commands
on the same line.


PHP Command termination

Each command must end with ; but
multiple commands per line are allowed.

ASP Screen output

response.write "hello"


PHP Screen output

echo "hello";


ASP Newline characters

vbCrLf

response.write "hello" & vbCrLf

PHP Newline characters

"\n" (must be inside "", not '')

echo "hello \n";

ASP Variable Names

Not case sensitive,
so fName is the same as FNAME

PHP Variable Names

Case sensitive AND must begin with $
so $fName is NOT the same as $FNAME

ASP String concatenation

&

fname=name1 & " " & name2
emsg=emsg & "error!"

PHP String concatenation

. and .=

$fname=$name1." ".$name2;
$emsg.="error!";

ASP, Change case

LCase(), UCase()

lowerName=LCase(chatName)
upperName=UCase(chatName)

PHP, Change case

strtolower(), strtoupper()

$lowerName=strtolower($chatName);
$upperName=strtoupper($chatName);

ASP String length

Len()

n=Len(chatName)


PHP String length

strlen()

$n=strlen($chatName);


ASP, Trim whitespace

Trim()

temp=Trim(xpage)


PHP, Trim whitespace

trim() and also ltrim(), rtrim()

$temp=trim($xpage);


ASP String sections

Left(), Right(), Mid()

Left("abcdef",3)      result = "abc"
Right("abcdef",2)     result = "ef"
Mid("abcdef",3)       result = "cdef"
Mid("abcdef",2,4)     result = "bcde"

PHP String sections

substr()

substr("abcdef",0,3);     result = "abc"
substr("abcdef",-2);      result = "ef"
substr("abcdef",2);       result = "cdef"
substr("abcdef",1,4);     result = "bcde"

ASP String search forward, reverse

Instr(), InstrRev()

x=Instr("abcdef","de")        x=4 
x=InstrRev("alabama","a")     x=7

PHP String search forward, reverse

strpos(), strrpos()

$x=strpos("abcdef","de");      x=3
$x=strrpos("alabama","a");     x=6

ASP String replace

Replace(string exp,search,replace)

temp=Replace(temp,"orange","apple")
temp=Replace(temp,"'","\'")
temp=Replace(temp,"""","\""")


PHP String replace

str_replace(search,replace,string exp)

$temp=str_replace("orange","apple",$temp); $temp=str_replace("'","\\'",$temp);
$temp=str_replace("\"","\\\"",$temp);


ASP, split a string into an array

Split()

temp="cows,horses,chickens"
farm=Split(temp,",",-1,1)  
x=farm(0)

PHP, split a string into an array

explode()

$temp="cows,horses,chickens";
$farm=explode(",",$temp);
$x=$farm[0];

ASP, convert ASCII to String

x=Chr(65) x="A"


PHP, convert ASCII to String

$x=chr(65); x="A"


ASP, convert String to ASCII

x=Asc("A") x=65


PHP, convert String to ASCII

$x=ord("A") x=65


ASP, if statements

if x=100 then
  x=x+5 
elseif x<200 then 
  x=x+2 
else 
  x=x+1 
end if

PHP, if statements

if ($x==100) { 
  $x=$x+5; 
} 
else if ($x<200) { 
  $x=$x+2; 
} 
else { 
  $x++; 
}

ASP, for loops

for x=0 to 100 step 2 
  if x>p then exit for
next

PHP, for loops

for ($x=0; $x<=100; $x+=2) { 
  if ($x>$p) {break;}
}

ASP, while loops

do while x<100 
  x=x+1 
  if x>p then exit do
loop

PHP, while loops

while ($x<100) { 
  $x++; 
  if ($x>$p) {break;}
}

ASP, branching

select case chartName
  case "TopSales"
    theTitle="Best Sellers"
    theClass="S"
  case "TopSingles"
    theTitle="Singles Chart"
    theClass="S"
  case "TopAlbums"
    theTitle="Album Chart"
    theClass="A"
  case else
    theTitle="Not Found"
end select

PHP, branching

switch ($chartName) {
  case "TopSales":
    $theTitle="Best Sellers"; $theClass="S";
    break;
  case "TopSingles":
    $theTitle="Singles Chart"; $theClass="S";
    break;
  case "TopAlbums":
    $theTitle="Album Chart"; $theClass="A";
    break;
  default:
    $theTitle="Not Found";
}

ASP functions

Function myFunction(x)
  myFunction = x*16  'Return value
End Function

PHP functions

function myFunction($x) {
  return $x*16;  //Return value
}

ASP, Server variables

Request.ServerVariables("SERVER_NAME")
Request.ServerVariables("SCRIPT_NAME")
Request.ServerVariables("HTTP_USER_AGENT")
Request.ServerVariables("REMOTE_ADDR")
Request.ServerVariables("HTTP_REFERER")

PHP, Server variables

$_SERVER["HTTP_HOST"];
$_SERVER["PHP_SELF"];
$_SERVER["HTTP_USER_AGENT"];
$_SERVER["REMOTE_ADDR"];
@$_SERVER["HTTP_REFERER"];     @ = ignore errors

ASP Page redirects

Response.redirect("wrong_link.htm")


PHP Page redirects

header("Location: wrong_link.htm");


ASP, GET and POST variables

Request.QueryString("chat")
Request.Form("username")


PHP, GET and POST variables

@$_GET["chat"];       @ = ignore errors
@$_POST["username"];


ASP, prevent page caching

Response.CacheControl="no-cache"
Response.AddHeader "pragma","no-cache"


PHP, prevent page caching

header("Cache-Control: no-store, no-cache");
header("Pragma: no-cache");


ASP, Limit script execution time, in seconds

Server.ScriptTimeout(240)


PHP, Limit script execution time, in seconds

set_time_limit(240);


ASP, Timing script execution

s_t=timer 

...ASP script to be timed...

duration=timer-s_t
response.write duration &" seconds"

PHP, Timing script execution

$s_t=microtime();

...PHP script to be timed...
  
$duration=microtime_diff($s_t,microtime());
$duration=sprintf("%0.3f",$duration);
echo $duration." seconds";
  
//required function
function microtime_diff($a,$b) {
  list($a_dec,$a_sec)=explode(" ",$a);
  list($b_dec,$b_sec)=explode(" ",$b);
  return $b_sec-$a_sec+$b_dec-$a_dec;
}

ASP, create a file system object (second line is wrapped)

'Required for all file system functions
fileObj=Server.CreateObject
 ("Scripting.FileSystemObject")


PHP, create a file system object

Not necessary in PHP


ASP, check if a file exists

pFile="data.txt"
fileObj.FileExists(Server.MapPath(pFile))


PHP, check if a file exists

$pFile="data.txt";
file_exists($pFile);


ASP, Read a text file

pFile="data.txt"
xPage=fileObj.GetFile(Server.MapPath(pFile))
xSize=xPage.Size  'Get size of file in bytes

xPage=fileObj.OpenTextFile(Server.MapPath(pFile))
temp=xPage.Read(xSize)  'Read file
linkPage.Close

PHP, Read a text file

$pFile="data.txt";
$temp=file_get_contents($pFile);  //Read file

ASP, Server Time or Date

Now, Date, Time


PHP, Server Time or Date

date()


ASP, Date format (default)

Now = 5/9/2008 10:14:59 AM
Date = 5/9/2008
Time = 10:14:59 AM

Various ASP functions extract date parts:

Month(Date) = 5
MonthName(Month(Date)) = May
Day(Date) = 9
WeekdayName(Weekday(Date)) = Friday
WeekdayName(Weekday(Date),False) = Fri


PHP, Date format

There is no default format in PHP.
The date() function is formatted using codes:

date("n/j/Y g:i:s A") = 5/9/2008 10:14:59 AM

date("n") = 5
date("F") = May
date("j") = 9
date("l") = Friday
date("D") = Fri


ASP, convert decimal to integer

Int()

n=Int(x)


PHP, convert decimal to integer

floor()

$n=floor($x);


ASP, determine if a value is numeric

IsNumeric()

if IsNumeric(n) then ...

PHP, determine if a value is numeric

is_numeric()

if (is_numeric($num)) {...}


ASP, modulus function

x mod y


PHP, modulus function

$x % $y