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Full Discussion: Check if a variable is zero
Top Forums Shell Programming and Scripting Check if a variable is zero Post 302480698 by jim mcnamara on Wednesday 15th of December 2010 02:00:16 PM
Old 12-15-2010
Those numbers, if they were treated as number or hex numbers overflow the limits of POSIX shell arithmetic. However strings are different.
Code:
#!/bin/ksh
iszero()   # print 1 if zero,  0 else
{
     ok=$(echo "$1" | tr -d '0')
     if [ -z "$ok" ] ; then
        print 1
     else
        print 0
     fi
}
a=574E47303030303030303030303030303030303135313937
b=000000000000000000000000000000000000000000000000
echo "$a  result: $(iszero $a)"
echo "$b  result: $(iszero $b)"

 

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MSSQL_NUM_FIELDS(3)													       MSSQL_NUM_FIELDS(3)

mssql_num_fields - Gets the number of fields in result

SYNOPSIS
int mssql_num_fields (resource $result) DESCRIPTION
mssql_num_fields(3) returns the number of fields in a result set. PARAMETERS
o $result - The result resource that is being evaluated. This result comes from a call to mssql_query(3). RETURN VALUES
Returns the number of fields, as an integer. EXAMPLES
Example #1 mssql_num_fields(3) example <?php // Connect to MSSQL and select the database $link = mssql_connect('KALLESPCSQLEXPRESS', 'sa', 'phpfi'); mssql_select_db('php', $link); // Select some data from our database $data = mssql_query('SELECT [name], [age] FROM [php].[dbo].[persons]'); // Construct a table echo '<table border="1">'; $header = false; // Iterate through returned results while ($row = mssql_fetch_array($data)) { // Build the table header if (!$header) { echo '<thead>'; echo '<tr>'; for ($i = 1; ($i + 1) <= mssql_num_fields($data); ++$i) { echo '<td>' . ucfirst($row[$i]) . '</td>'; } echo '</tr>'; echo '</thead>'; echo '<tbody>'; $header = true; } // Build the row echo '<tr>'; foreach($row as $value) { echo '<td>' . $value . '</td>'; } echo '</tr>'; } // Close table echo '</tbody>'; echo '</table>'; // Clean up mssql_free_result($data); mssql_close($link); ?> SEE ALSO
mssql_query(3), mssql_fetch_field(3), mssql_num_rows(3). PHP Documentation Group MSSQL_NUM_FIELDS(3)
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