05-20-2009
Cut portion of a field in shell scripts
Hi,
I am a file with the following layout.
field1|field2|field3|field4|field5|field6|field7
field1|field2|field3|field4|field5|field6|field7
field1|field2|field3|field4|field5|field6|field7
I need to write a file with the below layout
field1|field2|fieldx|field6
where fieldx = substring of field4.
I am using cut function to write the required fields. But I don't know how to get the substring of field 4 from the file to be written into the output file.
Please help.
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LEARN ABOUT PHP
fbsql_list_fields
FBSQL_LIST_FIELDS(3) 1 FBSQL_LIST_FIELDS(3)
fbsql_list_fields - List FrontBase result fields
SYNOPSIS
resource fbsql_list_fields (string $database_name, string $table_name, [resource $link_identifier])
DESCRIPTION
Retrieves information about the given table.
PARAMETERS
o $database_name
- The database name.
o $table_name
- The table name.
o $
link_identifier -A FrontBase link identifier returned by fbsql_connect(3) or fbsql_pconnect(3).If optional and not specified, the
function will try to find an open link to the FrontBase server and if no such link is found it will try to create one as if
fbsql_connect(3) was called with no arguments.
RETURN VALUES
Returns a result pointer which can be used with the fbsql_field_xxx functions, or FALSE on error.
ERRORS
/EXCEPTIONS
A string describing the error will be placed in $phperrmsg, and unless the function was called as @fbsql() then this error string will
also be printed out.
EXAMPLES
Example #1
fbsql_list_fields(3) example
<?php
$link = fbsql_connect('localhost', 'myname', 'secret');
$fields = fbsql_list_fields("database1", "table1", $link);
$columns = fbsql_num_fields($fields);
for ($i = 0; $i < $columns; $i++) {
echo fbsql_field_name($fields, $i) . "
";;
}
?>
The above example will output something similar to:
field1
field2
field3
SEE ALSO
fbsql_field_len(3), fbsql_field_name(3), fbsql_field_type(3), fbsql_field_flags(3).
PHP Documentation Group FBSQL_LIST_FIELDS(3)