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Perl: How to read text from file and process $variable in that data too.

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# 1  
Old 03-23-2012
[Solved] Perl: How to read text from file and process $variable in that data too.
In the hello.htm have the sentenses:
Code:
Hello $name 
How are you?

The perl script:
Code:
$name = "David";

open(HEADER,"hello.htm");
while(<HEADER>) { $html .= $_; }
close(HEADER);

print "$html";

I making something about template. But it can't process the $name variable.
Last edited by natong; 03-23-2012 at 03:12 PM..
# 2  
Old 03-23-2012
perl
Quote:
Originally Posted by natong
In the hello.htm have the sentenses:
Code:
Hello $name 
How are you?

The perl script:
Code:
$name = "David";
 
open(HEADER,"hello.htm");
while(<HEADER>) {$_ =~ s/(.*)(Hello)(.*)/$1$2 $name $3/gi;$html .= $_; }
close(HEADER);
 
print "$html";


I making something about template. But it can't process the $name variable.
Here i am substitute the name after "hello" found.
i modifier in pattern matching denotes ignore case.
s denotes sunstitution
g denotes global.

Cheers,
RangaSmilie
Last edited by rangarasan; 03-23-2012 at 08:19 AM..
This User Gave Thanks to rangarasan For This Post:
natong
# 3  
Old 03-23-2012
Good idea. Use search and replace. No other solution?

Code:
$name = "David";

open(HEADER,'hello.htm');
while(<HEADER>) { $_ =~ s/\$name/$name/g; $html .= $_; }
close(HEADER);

print "$html";

# 4  
Old 03-23-2012
You can do in various ways, But search and replace is the better way i think,
# 5  
Old 03-23-2012
Code:
 
$_ =~ s/\$(\w+)/${$1}/g;    #I don't know why didn't work
$_ =~ s/(\$\w+)/$1/eeg;     #Work!

These can replace any variables. Thanks!
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