/vj-include/class.ezsql.core.php
PHP | 372 lines | 183 code | 93 blank | 96 comment | 32 complexity | de60f66441a1b7e6fde9a9b8ea113731 MD5 | raw file
Possible License(s): LGPL-2.0, AGPL-1.0
- <?php
- /**********************************************************************
- * Author: Justin Vincent (justin@visunet.ie)
- * Web...: http://php.justinvincent.com
- * Name..: ezSQL
- * Desc..: ezSQL Core module - database abstraction library to make
- * it very easy to deal with databases.
- *
- */
- /**********************************************************************
- * ezSQL Constants
- */
- define('EZSQL_VERSION','2.0');
- define('OBJECT','OBJECT',true);
- define('ARRAY_A','ARRAY_A',true);
- define('ARRAY_N','ARRAY_N',true);
- define('EZSQL_CORE_ERROR','ezSQLcore can not be used by itself (it is designed for use by database specific modules).');
- /**********************************************************************
- * Core class containg common functions to manipulate query result
- * sets once returned
- */
- class ezSQLcore
- {
- var $trace = false; // same as $debug_all
- var $debug_all = false; // same as $trace
- var $debug_called = false;
- var $vardump_called = false;
- var $show_errors = false;
- var $num_queries = 0;
- var $last_query = null;
- var $last_error = null;
- var $col_info = null;
- var $captured_errors = array();
- /**********************************************************************
- * Constructor
- */
- function ezSQLcore() { }
- /**********************************************************************
- * Connect to DB - over-ridden by specific DB class
- */
- function connect() { die(EZSQL_CORE_ERROR); }
- /**********************************************************************
- * Select DB - over-ridden by specific DB class
- */
- function select() { die(EZSQL_CORE_ERROR); }
- /**********************************************************************
- * Basic Query - over-ridden by specific DB class
- */
- function query() { die(EZSQL_CORE_ERROR); }
- /**********************************************************************
- * Format a string correctly for safe insert - over-ridden by specific
- * DB class
- */
- function escape() { die(EZSQL_CORE_ERROR); }
- /**********************************************************************
- * Return database specific system date syntax
- * i.e. Oracle: SYSDATE Mysql: NOW()
- */
- function sysdate() { die(EZSQL_CORE_ERROR); }
- /**********************************************************************
- * Print SQL/DB error - over-ridden by specific DB class
- */
- function register_error($err_str) {
- // Keep track of last error
- $this->last_error = $err_str;
- // Capture all errors to an error array no matter what happens
- $this->captured_errors[] = array
- (
- 'error_str' => $err_str,
- 'query' => $this->last_query
- );
- }
- /**********************************************************************
- * Turn error handling on or off..
- */
- function show_errors() {
- $this->show_errors = true;
- }
- function hide_errors() {
- $this->show_errors = false;
- }
- /**********************************************************************
- * Kill cached query results
- */
- function flush() {
- // Get rid of these
- $this->last_result = null;
- $this->col_info = null;
- $this->last_query = null;
- }
- /**********************************************************************
- * Get one variable from the DB - see docs for more detail
- */
- function get_var($query=null,$x=0,$y=0) {
- // Log how the function was called
- $this->func_call = "\$db->get_var(\"$query\",$x,$y)";
- // If there is a query then perform it if not then use cached results..
- if ( $query ) { $this->query($query); }
- // Extract var out of cached results based x,y vals
- if ( $this->last_result[$y] ) {
- $values = array_values(get_object_vars($this->last_result[$y]));
- }
- // If there is a value return it else return null
- return (isset($values[$x]) && $values[$x]!=='')?$values[$x]:null;
- }
- /**********************************************************************
- * Get one row from the DB - see docs for more detail
- */
- function get_row($query=null,$output=OBJECT,$y=0) {
- // Log how the function was called
- $this->func_call = "\$db->get_row(\"$query\",$output,$y)";
- // If there is a query then perform it if not then use cached results..
- if ( $query ) {
- $this->query($query);
- }
- // If the output is an object then return object using the row offset..
- if ( $output == OBJECT ) {
- return $this->last_result[$y]?$this->last_result[$y]:null;
- }
- // If the output is an associative array then return row as such..
- elseif ( $output == ARRAY_A ) {
- return $this->last_result[$y]?get_object_vars($this->last_result[$y]):null;
- }
- // If the output is an numerical array then return row as such..
- elseif ( $output == ARRAY_N ) {
- return $this->last_result[$y]?array_values(get_object_vars($this->last_result[$y])):null;
- }
- // If invalid output type was specified..
- else
- {
- $this->print_error(" \$db->get_row(string query, output type, int offset) -- Output type must be one of: OBJECT, ARRAY_A, ARRAY_N");
- }
- }
- /**********************************************************************
- * Function to get 1 column from the cached result set based in X index
- * see docs for usage and info
- */
- function get_col($query=null,$x=0) {
- // If there is a query then perform it if not then use cached results..
- if ( $query ) { $this->query($query); }
- // Extract the column values
- for ( $i=0; $i < count($this->last_result); $i++ ) {
- $new_array[$i] = $this->get_var(null,$x,$i);
- }
- return $new_array;
- }
- /**********************************************************************
- * Return the the query as a result set - see docs for more details
- */
- function get_results($query=null, $output = OBJECT) {
- // Log how the function was called
- $this->func_call = "\$db->get_results(\"$query\", $output)";
- // If there is a query then perform it if not then use cached results..
- if ( $query ) { $this->query($query); }
- // Send back array of objects. Each row is an object
- if ( $output == OBJECT ) {
- return $this->last_result;
- }
- elseif ( $output == ARRAY_A || $output == ARRAY_N ) {
- if ( $this->last_result ) {
- $i=0;
- foreach( $this->last_result as $row ) {
- $new_array[$i] = get_object_vars($row);
- if ( $output == ARRAY_N ) {
- $new_array[$i] = array_values($new_array[$i]);
- }
- $i++;
- }
- return $new_array;
- }
- else {
- return null;
- }
- }
- }
- /**********************************************************************
- * Function to get column meta data info pertaining to the last query
- * see docs for more info and usage
- */
- function get_col_info($info_type="name",$col_offset=-1) {
- if ( $this->col_info ) {
- if ( $col_offset == -1 ) {
- $i=0;
- foreach($this->col_info as $col ) {
- $new_array[$i] = $col->{$info_type};
- $i++;
- }
- return $new_array;
- }
- else {
- return $this->col_info[$col_offset]->{$info_type};
- }
- }
- }
- /**********************************************************************
- * Dumps the contents of any input variable to screen in a nicely
- * formatted and easy to understand way - any type: Object, Var or Array
- */
- function vardump($mixed='') {
- echo "<p><table><tr><td bgcolor=ffffff><blockquote><font color=000090>";
- echo "<pre><font face=arial>";
- if ( ! $this->vardump_called ) {
- echo "<font color=800080><b>ezSQL</b> (v".EZSQL_VERSION.") <b>Variable Dump..</b></font>\n\n";
- }
- $var_type = gettype ($mixed);
- print_r(($mixed?$mixed:"<font color=red>No Value / False</font>"));
- echo "\n\n<b>Type:</b> " . ucfirst($var_type) . "\n";
- echo "<b>Last Query</b> [$this->num_queries]<b>:</b> ".($this->last_query?$this->last_query:"NULL")."\n";
- echo "<b>Last Function Call:</b> " . ($this->func_call?$this->func_call:"None")."\n";
- echo "<b>Last Rows Returned:</b> ".count($this->last_result)."\n";
- echo "</font></pre></font></blockquote></td></tr></table>";
- echo "\n<hr size=1 noshade color=dddddd>";
- $this->vardump_called = true;
- }
- /**********************************************************************
- * Alias for the above function
- */
- function dumpvar($mixed) { $this->vardump($mixed); }
- /**********************************************************************
- * Displays the last query string that was sent to the database & a
- * table listing results (if there were any).
- * (abstracted into a seperate file to save server overhead).
- */
- function debug() {
- echo "<blockquote>";
- // Only show ezSQL credits once..
- if ( ! $this->debug_called ) {
- echo "<font color=800080 face=arial size=2><b>ezSQL</b> (v".EZSQL_VERSION.") <b>Debug..</b></font><p>\n";
- }
- if ( $this->last_error ) {
- echo "<font face=arial size=2 color=000099><b>Last Error --</b> [<font color=000000><b>$this->last_error</b></font>]<p>";
- }
- echo "<font face=arial size=2 color=000099><b>Query</b> [$this->num_queries] <b>--</b> ";
- echo "[<font color=000000><b>$this->last_query</b></font>]</font><p>";
- echo "<font face=arial size=2 color=000099><b>Query Result..</b></font>";
- echo "<blockquote>";
- if ( $this->col_info ) {
- // =====================================================
- // Results top rows
- echo "<table cellpadding=5 cellspacing=1 bgcolor=555555>";
- echo "<tr bgcolor=eeeeee><td nowrap valign=bottom><font color=555599 face=arial size=2><b>(row)</b></font></td>";
- for ( $i=0; $i < count($this->col_info); $i++ )
- {
- echo "<td nowrap align=left valign=top><font size=1 color=555599 face=arial>{$this->col_info[$i]->type} {$this->col_info[$i]->max_length}</font><br><span style='font-family: arial; font-size: 10pt; font-weight: bold;'>{$this->col_info[$i]->name}</span></td>";
- }
- echo "</tr>";
- // ======================================================
- // print main results
- if ( $this->last_result )
- {
- $i=0;
- foreach ( $this->get_results(null,ARRAY_N) as $one_row )
- {
- $i++;
- echo "<tr bgcolor=ffffff><td bgcolor=eeeeee nowrap align=middle><font size=2 color=555599 face=arial>$i</font></td>";
- foreach ( $one_row as $item )
- {
- echo "<td nowrap><font face=arial size=2>$item</font></td>";
- }
- echo "</tr>";
- }
- } // if last result
- else {
- echo "<tr bgcolor=ffffff><td colspan=".(count($this->col_info)+1)."><font face=arial size=2>No Results</font></td></tr>";
- }
- echo "</table>";
- } // if col_info
- else {
- echo "<font face=arial size=2>No Results</font>";
- }
- echo "</blockquote></blockquote><hr noshade color=dddddd size=1>";
- $this->debug_called = true;
- }
- function reset_error() {
- $this->captured_errors = array();
- $this->last_error = "";
- }
- }
- ?>