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Full Discussion: Reverse of a string
Top Forums Shell Programming and Scripting Reverse of a string Post 302558135 by manishdivs on Thursday 22nd of September 2011 11:09:37 PM
Old 09-23-2011
Reverse of a string

Hi All,

I have a String str="Manish". I would like to reverse it.

I know the option to do this in bash is: echo "Manish" | rev

but I have seen an alternate solution somewhere, which states that:

Code:
str="Manish" echo $str | awk '{ for(i=length($0);i>=1;i--) printf("%s",substr($0,i,1)); }'

In above script I have a doubt about the $0.

when I use $0 on console then it gives output : bash, while using it in script it is showing the desired output.

Could anyone please help me in understanding the $0 work here..

Many thanks in advance.

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Last edited by radoulov; 09-24-2011 at 04:13 AM..
 

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MB_STRTOLOWER(3)							 1							  MB_STRTOLOWER(3)

mb_strtolower - Make a string lowercase

SYNOPSIS
string mb_strtolower (string $str, [string $encoding = mb_internal_encoding()]) DESCRIPTION
Returns $str with all alphabetic characters converted to lowercase. PARAMETERS
o $str - The string being lowercased. o $encoding -The $encoding parameter is the character encoding. If it is omitted, the internal character encoding value will be used. RETURN VALUES
$str with all alphabetic characters converted to lowercase. UNICODE
For more information about the Unicode properties, please see http://www.unicode.org/unicode/reports/tr21/. By contrast to strtolower(3), 'alphabetic' is determined by the Unicode character properties. Thus the behaviour of this function is not affected by locale settings and it can convert any characters that have 'alphabetic' property, such as A-umlaut (A). EXAMPLES
Example #1 mb_strtolower(3) example <?php $str = "Mary Had A Little Lamb and She LOVED It So"; $str = mb_strtolower($str); echo $str; // Prints mary had a little lamb and she loved it so ?> Example #2 mb_strtolower(3) example with non-Latin UTF-8 text <?php $str = "Txiotn a nE Baos unuvn yn, dpaokeCei unp vw0po kuvs"; $str = mb_strtolower($str, 'UTF-8'); echo $str; // Prints txiotn a nE Baos unuvn yn, dpaokeCei unp vw0po kuvs ?> SEE ALSO
mb_strtoupper(3), mb_convert_case(3), strtolower(3). PHP Documentation Group MB_STRTOLOWER(3)
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