Tabspace "t" metacharacter in Regular Expression.
How is "t" metacharacter is used in regular expression?
Explanation
The "t" metacharacter is used to match any tabspace in regex.
<?php
$str = "hiox india";
if (preg_match("/t/", $str, $matches))
echo "Pattern matches!";
else
echo "Pattern not matched!";
?> Result :
Pattern matches!
In the above example for regex the string "$str" has a tab space, so it matches.
#! C:programfilesperlbinperl
print "content-type: text/htmlnn";
$str = "hi how are you";
if ($str =~ m/t/)
{print "It's matched!";}
else
{print "It's not matched!";} Result :
It's not matched!
In the above tabspace metacharacter example for regex the pattern "/t/" is unmatched as the string does not have any tab spaces.
PHP Example:
<?php
$str = "hiox india";
if (preg_match("/t/", $str, $matches))
echo "Pattern matches!";
else
echo "Pattern not matched!";
?>
Pattern matches!
In the above example for regex the string "$str" has a tab space, so it matches.
Perl Example:
#! C:programfilesperlbinperl
print "content-type: text/htmlnn";
$str = "hi how are you";
if ($str =~ m/t/)
{print "It's matched!";}
else
{print "It's not matched!";}
It's not matched!
In the above tabspace metacharacter example for regex the pattern "/t/" is unmatched as the string does not have any tab spaces.
