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Full Discussion: variable comparison
Top Forums Shell Programming and Scripting variable comparison Post 302323710 by TonyFullerMalv on Monday 8th of June 2009 07:08:15 PM
Old 06-08-2009
Quote:
if they have space put variables in double quotes
Also if either variable my be empty then put variables is double quotes:
Code:
$ echo ${FRED}

$ FREDA=Freda
$ echo ${FREDA}
Freda
$ if [ ${FRED} = ${FREDA} ]; then echo Equal; else; echo Not equal; fi
bash: [: =: unary operator expected
Not equal
$ if [ "${FRED}" = "${FREDA}" ]; then echo Equal; else echo Not equal; fi
Not equal
$

 

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PARSE_STR(3)								 1							      PARSE_STR(3)

parse_str - Parses the string into variables

SYNOPSIS
void parse_str (string $str, [array &$arr]) DESCRIPTION
Parses $str as if it were the query string passed via a URL and sets variables in the current scope. Note To get the current QUERY_STRING, you may use the variable $_SERVER['QUERY_STRING']. Also, you may want to read the section on vari- ables from external sources. Note The magic_quotes_gpc setting affects the output of this function, as parse_str(3) uses the same mechanism that PHP uses to populate the $_GET, $_POST, etc. variables. PARAMETERS
o $str - The input string. o $arr - If the second parameter $arr is present, variables are stored in this variable as array elements instead. RETURN VALUES
No value is returned. EXAMPLES
Example #1 Using parse_str(3) <?php $str = "first=value&arr[]=foo+bar&arr[]=baz"; parse_str($str); echo $first; // value echo $arr[0]; // foo bar echo $arr[1]; // baz parse_str($str, $output); echo $output['first']; // value echo $output['arr'][0]; // foo bar echo $output['arr'][1]; // baz ?> SEE ALSO
parse_url(3), pathinfo(3), http_build_query(3), get_magic_quotes_gpc(3), urldecode(3). PHP Documentation Group PARSE_STR(3)
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