I am not clear how to construct a multidimensional array to create a simple datagrid framework. I have a number of class methods with crud select statements from MySQL tables in the format:
<?php
function table1()
{
$sql = "SELECT * FROM `table1`";
$result = mysqli_query ($link, $sql);
$html = "<table>";
while ($row = mysqli_fetch_array( $result ))
{
$html .= "<tr><td>".$row['field_a']."</td><td>".$row['field_b']."</td></tr>";
}
$html .= "</table>";
return $html;
}
function table2()
{
$sql = "SELECT * FROM `table2`";
$result_properties = mysqli_query ($link, $sql);
$html = "<table>";
while ($row = mysqli_fetch_array( $result ))
{
$html .= "<tr><td>".$row['field_x']."</td><td>".$row['field_y']."</td></tr>";
}
$html .= "</table>";
return $html;
}
?>
where the MySQL tables look like:
table1
+---------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------+--------------+------+-----+---------+----------------+
| id | bigint(12) | NO | PRI | NULL | auto_increment |
| field_a | varchar(128) | NO | | NULL | |
| field_b | varchar(128) | NO | | NULL | |
+---------+--------------+------+-----+---------+----------------+
table 2
+---------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------+--------------+------+-----+---------+----------------+
| id | bigint(12) | NO | PRI | NULL | auto_increment |
| field_x | varchar(128) | NO | | NULL | |
| field_y | varchar(128) | NO | | NULL | |
+---------+--------------+------+-----+---------+----------------+
I am trying to replace all these methods with a single datagrid method, selecting information about each individual table from two summary grid tables - one with properties of each table (table name and the select sql statement for that table) and the other with field names and headings for each individual table:
grid_properties
+------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+------------+--------------+------+-----+---------+----------------+
| id | bigint(12) | NO | PRI | NULL | auto_increment |
| table | varchar(128) | NO | | NULL | |
| select_sql | varchar(128) | NO | | NULL | |
+------------+--------------+------+-----+---------+----------------+
grid_fields
+--------------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+--------------------+--------------+------+-----+---------+----------------+
| id | bigint(12) | NO | PRI | NULL | auto_increment |
| grid_properties_id | bigint(12) | NO | | NULL | |
| heading | varchar(128) | NO | | NULL | |
| field | varchar(128) | NO | | NULL | |
+--------------------+--------------+------+-----+---------+----------------+
Data in the grid_fields
. field
column is intended to just be the field name of the table referenced in grid_properties
. table
, related through grid_properties
. id
:: grid_fields
. grid_properties_id
.
The method I am using to construct the datagrid has a multidimensional array in the last while loop that has something wrong with it. What is the correct way to construct this?
<?php
function grid_schema($table)
{
// Get information about $table from the grid_properties table
$sql = "SELECT * FROM `grid_properties` WHERE `table` LIKE '".$table."'";
$result_properties = mysqli_query ($link, $sql);
$properties = mysqli_fetch_array ($result1);
$properties_sql = $properties['select_sql'];
$id = $properties['id'];
// Get information about the grid field names
$fields_sql = "SELECT * FROM `grid_fields` WHERE `grid_properties_id` ='".$id."'";
$fields_result = mysqli_query ($link, $fields_sql);
// Display the Table Headings
$html = "<table><tr>";
while ($fields_row = mysqli_fetch_array ( $fields_result ))
{ $html .= "<th>".$fields_row['heading']."</th>"; }
$html .= "</tr>";
// Perform the SQL query from the grid_properties table
$properties_result = mysqli_query ($link, $properties_sql);
while ($properties_row = mysqli_fetch_array ($properties_result))
{
// Print out the contents of each row
$html .= "<tr>";
while ($fields_row = mysqli_fetch_array( $fields_result ))
{
// This is where I am having problems
$html .= "<td>".$properties_row[$fields_row]['field']."</td>";
}
}
$html .= "</table>";
return $html;
}
?>
<?php
function grid_schema($table)
{
$link = mysqli_connect("localhost", "root", "", "test");
// Get information about $table from the grid_properties table
$sql = "SELECT * FROM `grid_properties` WHERE `table` LIKE '".$table."'";
$result_properties = mysqli_query ($link, $sql);
$properties = mysqli_fetch_array ($result_properties, MYSQLI_ASSOC);
$properties_sql = $properties['select_sql'];
$id = $properties['id'];
// Get information about the grid field names
$fields_sql = "SELECT * FROM `grid_fields` WHERE `grid_properties_id` ='".$id."'";
$fields_result = mysqli_query ($link, $fields_sql);
// Display the Table Headings
$html = "<table><tr>";
$rows = array();
while ($fields_row = mysqli_fetch_array ( $fields_result, MYSQLI_ASSOC ))
{
$rows[] = $fields_row['field'];
$html .= "<th>".$fields_row['heading']."</th>";
}
$html .= "</tr>";
// Perform the SQL query from the grid_properties table
$properties_result = mysqli_query ($link, $properties_sql);
while ($properties_row = mysqli_fetch_array ($properties_result, MYSQLI_ASSOC))
{
// Print out the contents of each row
$html .= "<tr>";
foreach($rows as $row)
{
// This is where I am having problems
$html .= "<td>".$properties_row[$row]."</td>";
}
}
$html .= "</table>";
return $html;
}
echo grid_schema('table1');
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