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Top Forums Shell Programming and Scripting Identify variables used in the shell script Post 302786933 by CarloM on Thursday 28th of March 2013 12:05:18 PM
Old 03-28-2013
Missed p? Seems to be matching too much as well (AIX):
Code:
[user@host]  echo '/\$var/temp_dir/\${var2}\${var3}.log'  | sed -n 's/.*\(\$[a-zA-Z0-9]*\).*/\1/'
[user@host]  echo '/\$var/temp_dir/\${var2}\${var3}.log'  | sed -n 's/.*\(\$[a-zA-Z0-9]*\).*/\1/p'
$

You could have something along the lines of:
Code:
 echo '/$var/temp_dir/${var2}$var3.log'  | sed -n 's/[^$]*\($[[:alnum:]]*\)[^[:alnum:]].*/\1/p'
$var

but it will only handle 1 variable per line, and probably doesn't deal correctly with shell builtins...
 

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OUTPUT_ADD_REWRITE_VAR(3)						 1						 OUTPUT_ADD_REWRITE_VAR(3)

output_add_rewrite_var - Add URL rewriter values

SYNOPSIS
bool output_add_rewrite_var (string $name, string $value) DESCRIPTION
This function adds another name/value pair to the URL rewrite mechanism. The name and value will be added to URLs (as GET parameter) and forms (as hidden input fields) the same way as the session ID when transparent URL rewriting is enabled with session.use_trans_sid. Please note that absolute URLs (http://example.com/..) aren't rewritten. This function's behavior is controlled by the url_rewriter.tags php.ini parameter. Note Calling this function will implicitly start output buffering if it is not active already. PARAMETERS
o $name - The variable name. o $value - The variable value. RETURN VALUES
Returns TRUE on success or FALSE on failure. EXAMPLES
Example #1 output_add_rewrite_var(3) example <?php output_add_rewrite_var('var', 'value'); // some links echo '<a href="file.php">link</a> <a href="http://example.com">link2</a>'; // a form echo '<form action="script.php" method="post"> <input type="text" name="var2" /> </form>'; print_r(ob_list_handlers()); ?> The above example will output: <a href="file.php?var=value">link</a> <a href="http://example.com">link2</a> <form action="script.php" method="post"> <input type="hidden" name="var" value="value" /> <input type="text" name="var2" /> </form> Array ( [0] => URL-Rewriter ) SEE ALSO
output_reset_rewrite_vars(3), ob_flush(3), ob_list_handlers(3). PHP Documentation Group OUTPUT_ADD_REWRITE_VAR(3)
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