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Full Discussion: queries about exit
Top Forums Shell Programming and Scripting queries about exit Post 302241815 by joeyg on Tuesday 30th of September 2008 11:04:17 AM
Old 09-30-2008
Hammer & Screwdriver

exit 1 and exit 2 both end a process. The difference is that they pass different values to the calling program. For example:

Code:
# main program commands
script_ar
if [ "$?" -ne 0 ]
   then
   echo "error returned from script_ar"
   if [ "$?" -eq 1 ]
      then
      echo "error 1 = bad filename"
   fi
   if [ "$?" -eq 2 ]
      then
      echo "error 2 = bad record count"
   fi
fi

The above main program calls script_ar. It analyzes the return value (the 1 or 2 you asked about). If the value is set, the program echo's an error and then specific error information that you designed into the routines.

It is normally good programming practice to use
exit 0
when ending a program that ran correctly
exit 1 (or other number)
when ending a program that had a problem
 

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PG_FETCH_ROW(3) 														   PG_FETCH_ROW(3)

pg_fetch_row - Get a row as an enumerated array

SYNOPSIS
array pg_fetch_row (resource $result, [int $row]) DESCRIPTION
pg_fetch_row(3) fetches one row of data from the result associated with the specified $result resource. Note This function sets NULL fields to the PHP NULL value. PARAMETERS
o $result - PostgreSQL query result resource, returned by pg_query(3), pg_query_params(3) or pg_execute(3) (among others). o $row - Row number in result to fetch. Rows are numbered from 0 upwards. If omitted or NULL, the next row is fetched. RETURN VALUES
An array, indexed from 0 upwards, with each value represented as a string. Database NULL values are returned as NULL. FALSE is returned if $row exceeds the number of rows in the set, there are no more rows, or on any other error. EXAMPLES
Example #1 pg_fetch_row(3) example <?php $conn = pg_pconnect("dbname=publisher"); if (!$conn) { echo "An error occurred. "; exit; } $result = pg_query($conn, "SELECT author, email FROM authors"); if (!$result) { echo "An error occurred. "; exit; } while ($row = pg_fetch_row($result)) { echo "Author: $row[0] E-mail: $row[1]"; echo "<br /> "; } ?> SEE ALSO
pg_query(3), pg_fetch_array(3), pg_fetch_object(3), pg_fetch_result(3). PHP Documentation Group PG_FETCH_ROW(3)
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