/
DB_Func.php
286 lines (270 loc) · 7.88 KB
/
DB_Func.php
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<?php
/****************************************************************************
Function to manage DB queries
****************************************************************************/
/////////////////////////////////////////////////////////////////////////////
// PG_QueryStart
// ====================
//
// Begin query on PostgrSQL: all the parameter are global variables
function PG_QueryStart( $SQL, &$aFields, &$link, &$Errors )
{
$gMyHOST = "127.0.0.1";
$gMyDB = "osm";
$gMyUSER = "osm";
$gMyPASS = "insertPassword";
$Errors = "";
$result = false;
$conn_string = "host=$gMyHOST port=5432 dbname=$gMyDB user=$gMyUSER password=$gMyPASS";
$link = pg_connect( $conn_string );
if( $link === false )
$Errors .= "Impossibile connettersi a '$gMyHOST' come '$gMyUSER'";
else
{
$result = pg_query( $SQL );
if( $result === false )
$Errors .= ($Errors[0] ? "" : "<br>") . "Errore durante la query '$SQL': " . pg_last_error();
else
{
$nFields = pg_num_fields( $result );
for( $ind = 0; $ind < $nFields; $ind++ )
{
$aFields[$ind] = array( pg_field_name( $result, $ind ), pg_field_type( $result, $ind ) );
}
}
}
return( $result );
}
/////////////////////////////////////////////////////////////////////////////
// PG_QueryEnd
// ====================
// query end: all the results and links are free now
function PG_QueryEnd( $link, $result )
{
if( !($result === false) )
pg_free_result( $result );
if( !($link === false) )
pg_close( $link );
}
/////////////////////////////////////////////////////////////////////////////
// PG_SimpleQuery
// ==============
// query without record, only the result
function PG_SimpleQuery( $SQL, &$Errors )
{
$result = PG_QueryStart( $SQL, $aFields, $link, $Errors );
PG_QueryEnd( $link, $result );
}
/////////////////////////////////////////////////////////////////////////////
// SQL_Ins_Prep
// ====================
// organization for INSERT query:
// FName = field names
// FVal = field values
// Name = current field
// Value = value current field
// ======> insert into TBL (FName) values (FVal)
function SQL_Ins_Prep( &$FName, &$FVal, $Name, $Value )
{
if( $FName != "" )
{
$FName .= ", ";
$FVal .= ", ";
}
$FName .= $Name;
if( $Value == "now()" )
$FVal .= $Value;
else if( is_string( $Value ) )
$FVal .= "'" . str_replace( "'", "''", $Value ) . "'";
else if( isset($Value) )
$FVal .= $Value;
else
$FVal .= "null";
}
/////////////////////////////////////////////////////////////////////////////
// SQL_Upd_Prep
// ====================
// UPDATE query:
// SET = operations
// Name = current field
// Value = current field value
// ======> update TBL SET where CODITION
function SQL_Upd_Prep( &$SET, $Name, $Value )
{
if( $SET != "" )
{
$SET .= ", ";
}
$SET .= $Name . " = ";
if( $Value == "now()" )
$SET .= $Value;
else if( is_string( $Value ) )
{
$SET .= "'" . str_replace( "'", "''", $Value ) . "'";
}
else if( isset($Value) )
$SET .= $Value;
else
$SET .= "null";
}
/////////////////////////////////////////////////////////////////////////////
// GetSelFromArray
// ===============
// Search row in the array with the corrispetive value
function GetSelFromArray( $aData, $Value, $nCol )
{
$nData = count( $aData );
if( !isset($nCol) || $nCol < 0 )
$nCol = 0;
$nSel = -1;
for( $j = 0; $j < $nData && $nSel < 0; $j++ )
{
if( $aData[$j][$nCol] == $Value )
$nSel = $j;
}
return( $nSel );
}
/////////////////////////////////////////////////////////////////////////////
// Load_Data2Array
// ===============
// Load the query result in an array
function Load_Data2Array( $SQL, &$aData, &$Errors )
{
$aData = array();
$nData = 0;
$Errors = "";
$result = PG_QueryStart( $SQL, $aFields, $link, $Errors );
if( !($result === false) )
{
while( $qRow = pg_fetch_array( $result, null, PGSQL_NUM ) )
{
$aData[$nData++] = $qRow;
}
}
PG_QueryEnd( $link, $result );
if( $Errors != "" )
$nData = -1;
// echo "\n<!-- $SQL ==> $nData -->\n";
return( $nData );
}
/////////////////////////////////////////////////////////////////////////////
// Load_Data2ArrayEx
// =================
// Carica il risultato di una query in un array
function Load_Data2ArrayEx( $SQL, &$aData, &$aFields, &$Errors )
{
$aData = array();
$nData = 0;
$Errors = "";
$result = PG_QueryStart( $SQL, $aFields, $link, $Errors );
if( !($result === false) )
{
while( $qRow = pg_fetch_array( $result, null, PGSQL_NUM ) )
{
$aData[$nData++] = $qRow;
}
}
PG_QueryEnd( $link, $result );
if( $Errors != "" )
$nData = -1;
// echo "\n<!-- $SQL ==> $nData -->\n";
return( $nData );
}
/////////////////////////////////////////////////////////////////////////////
// Load_Data2JS
// ===============
// Scrive come array JavaScript il risultato di una query
function Load_Data2JS( $SQL, $sName, &$Errors )
{
$AName = "_a" . $sName;
$CName = "_n" . $sName;
$myHTML = "\n<script type='text/javascript'>\n";
$myHTML .= "<!--\n";
// $myHTML .= "// $SQL\n";
$myHTML .= "$AName = Array();\n";
$myHTML .= "$CName = 0;\n";
$Errors = "";
$result = PG_QueryStart( $SQL, $aFields, $link, $Errors );
if( !($result === false) )
{
$nFields = count( $aFields );
while( $qRow = pg_fetch_array( $result, null, PGSQL_NUM ) )
{
$myHTML .= $AName . "[" . $CName . "++] = Array( ";
for( $j = 0; $j < $nFields; $j++ )
{
if( $j > 0 )
$myHTML .= ", ";
if( ! isset($qRow[$j]) )
$myHTML .= "null";
else if( is_numeric( $qRow[$j] ) )
$myHTML .= $qRow[$j];
else if( is_string( $qRow[$j] ) )
{
$sText = str_replace( "à", "à", $qRow[$j] );
$sText = str_replace( "é", "&eacuta;", $sText );
$sText = str_replace( "è", "è", $sText );
$sText = str_replace( "ì", "ì", $sText );
$sText = str_replace( "ò", "ò", $sText );
$sText = str_replace( "ù", "ù", $sText );
$sText = str_replace( "\"", "\\\"", $sText );
$myHTML .= "\"$sText\"";
}
else
{
$dtVal = MySQL_DateConv( $qRow[$j] );
$myHTML .= strftime("'%d-%m-%Y'", $dtVal );
}
}
$myHTML .= ");\n";
}
}
PG_QueryEnd( $link, $result );
$myHTML .= "//-->\n";
$myHTML .= "</script>\n";
return( $myHTML );
}
/////////////////////////////////////////////////////////////////////////////
// Load_Data2JSON
// ===============
// Scrive come array JSON il risultato di una query
function Load_Data2JSON( $SQL, $sName="", $bShowError=true, $noHeader =true)
{
$nFD = fopen( "Load_Data2JSOS.trc", "a" );
if( $nFD > 0 )
{
$sTime = strftime("%Y-%m-%d %H:%M:%S",time());
fputs( $nFD, "$sTime | $SQL\n" );
fclose( $nFD );
}
$Errors = "";
$JSON = "";
$nData = 0;
$result = PG_QueryStart( $SQL, $aFields, $link, $Errors );
if( !($result === false) )
{
$nFields = count( $aFields );
if(!$noHeader)
$JSON .= "{\n\t \"name\": \"".$sName."\",\n\t \"items\":[\n ";
while( $qRow = pg_fetch_array( $result, null, PGSQL_NUM ) )
{
if( $nData > 0 )
$JSON .= ",\n";
$JSON .= "\t{\n";
for( $j = 0; $j < $nFields; $j++ )
{
$sVal = "" . $qRow[$j];
$JSON .= "\t\t\"".htmlspecialchars($aFields[$j][0])."\": \"".htmlspecialchars($sVal)."\"";
if($j< ($nFields-1))
$JSON.=",\n";
}
$JSON .= "\n\t}";
$nData++;
}
if(!$noHeader)
$JSON .= "]}";
}
PG_QueryEnd( $link, $result );
return( $JSON );
}
?>