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Full Discussion: Array question
Top Forums UNIX for Dummies Questions & Answers Array question Post 302753973 by bakunin on Wednesday 9th of January 2013 08:51:21 PM
Old 01-09-2013
The problem is the behavior of the "for"-loop in connection with an obvious misunderstanding about what "${arr[*]}" means.

The subscript "*" in an array denotes ALL array elements and it is expanded before the for-loop is executed. Therefore this is what the shell "sees":

Code:
for i in ${arr[*]}            # original line, begin of parsing process
for i in hello my name is     # after expanding the variables

Now, "$i" is assigned one word each pass of the for-loop because this is how this kind of loop behaves. There are two possibilities to correct this:

1. Use a while-loop instead:

Code:
echo ${arr[*]} | while read a ; do
     echo $a
done

2. Instead of using this faulty way of expanding the array count elements:

Code:
i=1
for i in {1..${#arr[*]}} ; do
     echo ${arr[$i]}
done

"${#arrayname[*]}" expands to the number of elements in your array (instead of the whole array itself), in your case: 2.

I hope this helps.

bakunin
 

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PG_FETCH_ARRAY(3)														 PG_FETCH_ARRAY(3)

pg_fetch_array - Fetch a row as an array

SYNOPSIS
array pg_fetch_array (resource $result, [int $row], [int $result_type = PGSQL_BOTH]) DESCRIPTION
pg_fetch_array(3) returns an array that corresponds to the fetched row (record). pg_fetch_array(3) is an extended version of pg_fetch_row(3). In addition to storing the data in the numeric indices (field number) to the result array, it can also store the data using associative indices (field name). It stores both indicies by default. Note This function sets NULL fields to the PHP NULL value. pg_fetch_array(3) is NOT significantly slower than using pg_fetch_row(3), and is significantly easier to use. 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. o $result_type - An optional parameter that controls how the returned array is indexed. $result_type is a constant and can take the following values: PGSQL_ASSOC, PGSQL_NUM and PGSQL_BOTH. Using PGSQL_NUM, pg_fetch_array(3) will return an array with numerical indices, using PGSQL_ASSOC it will return only associative indices while PGSQL_BOTH, the default, will return both numerical and associa- tive indices. RETURN VALUES
An array indexed numerically (beginning with 0) or associatively (indexed by field name), or both. Each value in the array is 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_array(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; } $arr = pg_fetch_array($result, 0, PGSQL_NUM); echo $arr[0] . " <- Row 1 Author "; echo $arr[1] . " <- Row 1 E-mail "; // As of PHP 4.1.0, the row parameter is optional; NULL can be passed instead, // to pass a result_type. Successive calls to pg_fetch_array will return the // next row. $arr = pg_fetch_array($result, NULL, PGSQL_ASSOC); echo $arr["author"] . " <- Row 2 Author "; echo $arr["email"] . " <- Row 2 E-mail "; $arr = pg_fetch_array($result); echo $arr["author"] . " <- Row 3 Author "; echo $arr[1] . " <- Row 3 E-mail "; ?> SEE ALSO
pg_fetch_row(3), pg_fetch_object(3), pg_fetch_result(3). PHP Documentation Group PG_FETCH_ARRAY(3)
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