6 replies to this topic

[ezcat]

I'm trying to write a script from within a script. The attached code works, however, the variable $line4 needs to be "$_SESSION['pic_Index']='10030';.

If I include the "$" in front of "_SESSION..." I get a program error. Is there anyway to write "$_SESSION..." to the file without getting an error?

<?php

Echo "Write file.........";

// write first file

$filename = 'olgtemp1.php';

$open_it = fopen($filename, 'w+') or die("Can't open file");

$line1 = "<?php \n";

$rc = fwrite($open_it, $line1);

$line2 = "session_start(); \n";

$rc = fwrite($open_it, $line2);

$line3 = "//Temp file created by olg13.php for use by olglistpics.php \n";

$rc = fwrite($open_it, $line3);


$line4 = "_SESSION['pic_Index']='10030'; \n";

$rc = fwrite($open_it, $line4);


$line5 = "include('olglistpics.php'); \n";

$rc = fwrite($open_it, $line5);

$line6 = "?>";

$rc = fwrite($open_it, $line6);

fclose($open_it);

?>

Thanks,
Jon

[Orjan]

the easiest way is to embrace the line with apostrophes (') instead, as the string is not parsed before usage then, and change the apostrophes inside to quotation marks

$line4 = '$_SESSION["pic_Index"]="10030"; \n'; 

[ezcat]

Thank you for explaining the difference between (') and ("). I did not know and is a good lesson learned.

Thank you,
Jon

[thetit4n]

There are also some situations where that won't work. Like if you need to include a " ' " for example. In that case you can escape the character with a "\". This will make the PHP processor see the character as text and not PHP.

for example you could do

<?php


$string = "\$_SESSION[\'foo\'] = \"bar\";"


?>

[Orjan]

although much easier to prevent parsing the string by using ' instead of " in this specific cases. I don't know anywhere in php you can't change between apostrophes and quotation marks without problems, unless you want to php-parse the string.

for calling a specific post in an array, there's not even need for any marks
$test[var], $test['var'], $test["var"] are equivalent in this case.

[thetit4n]

What if you wanted to do this?

echo "And mike said "$var['foo']" to roger.";

You would have to escape them or use curly braces. I wasn't trying to say you were wrong I just felt he should know the alternative in case he ever came across a situation that he needed it.

[Orjan]

what about

echo 'And mike said "$var[foo]" to roger.';

that is if you want to echo the variable name. if you want to parse the variable name,

echo 'And mike said "'.$var[foo].'" to roger.';

is easier to write, read and understand.