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BUSINESS LOGIC
PHP and MySQL example application - adhoc database analysis example from a Well House Consultants training course
More on PHP and MySQL example application - adhoc database analysis [link] Source code: businesslogic.inc Module: H204
<?php
/* These are the things we need read_config($from); makeform_login(); $role = validate_login(); store_login(); makeform_basequery(); $tuneit = validate_base(); store_base(); makeform_rows(); validate_rows(); store_rows(); makeform_cols(); validate_cols(); store_cols(); makeform_grouping(); validate_groups(); store_groups(); makeform_result() $whatnext = validate_results(); store_results(); run_query(); ////////////////////////////////////////////////////////// */ require_once ("$include_from/sqlwrapper.inc"); function read_config($source) { $fh = fopen($source,"r"); $_SESSION[config] = array(); while ($line = fgets($fh,65536)) { $line = trim($line); if ($line == "" or ereg("^#",$line)) continue; $fields = explode(" ",$line); $fname = array_shift($fields); if (! is_array($_SESSION[config][$fname])) { $_SESSION[config][$fname] = array(); } array_push($_SESSION[config][$fname],implode(" ",$fields)); } } function makeform_login() { $fields = array ( array("name","Your name:",$_POST[name]), array("password","Your password:",$_POST[password], "type" => "password")); $form = makeform($fields); return $form; } function validate_login() { global $error; global $_warnings; $role = ""; if ($_POST[name] != "demo") { $error = 1; $_warnings[name] = "Invalid account"; $_warnings[password] = "Invalid account"; } if ($_POST[password] != "xxx111") { $error = 1; $_warnings[name] = "Invalid account"; $_warnings[password] = "Invalid account"; } if ($error != 1) { $role = "user"; } return $role; } function store_login() { $_SESSION[user] = $_POST[name]; } function makeform_basequery() { // To be "Choose a standard query" $fields = array(array("bq","Which query?",$_POST[onto], type => "submit", options => "default|tuned")); $form = makeform($fields); return $form; } function validate_base() { $_SESSION[wheres] = array(); if ($_POST[bq] == "tuned") return 1; makeform_cols(); // To force column selection defaults // More to be added return 0; // tune it? Not at first! } function store_base() { } function makeform_rows() { $fields = array(); foreach ($_SESSION[config]["whereopt:"] as $orow) { $testtypes = explode(" ",$orow); $testfield = array_shift($testtypes); foreach ($testtypes as $thistest) { $rowtest = array("$testfield/$thistest", "A <b>$thistest</b> test is on <b>$testfield</b>", $_SESSION["$testfield/$thistest"]); array_push($fields,$rowtest); } } $form = makeform($fields); return $form; } function makeform_cols() { $fields = array(); foreach ($_SESSION[config]["displayopt:"] as $ocol) { $colinfo = explode(" ",$ocol); $testfield = array_shift($colinfo); $defcolstat = array_shift($colinfo); // Add handling to offer sort options if ($defcolstat != "always" and $defcolstat != "never") { if ($defcolstat == "on" and ! is_string($_SESSION["$testfield/display"])) $_SESSION["$testfield/display"] = "on"; $coltest = array("$testfield/display", "Display column <b>$testfield</b>", $_SESSION["$testfield/display"], type => "checkbox"); array_push($fields,$coltest); } } $form = makeform($fields); return $form; } function validate_rows() { // To add - check that lessthan contains a number and a host of // other checks } function validate_cols() { // To add - checks } function store_rows() { foreach ($_SESSION[config]["whereopt:"] as $orow) { $testtypes = explode(" ",$orow); $testfield = array_shift($testtypes); foreach ($testtypes as $thistest) { $_SESSION["$testfield/$thistest"] = stripslashes($_POST["$testfield/$thistest"]) ; } } } function store_cols() { foreach ($_SESSION[config]["displayopt:"] as $ocol) { $testtypes = explode(" ",$ocol); $discol = array_shift($testtypes); $disdef = array_shift($testtypes); $_SESSION["$discol/display"] = stripslashes($_POST["$discol/display"]) ; } } function makeform_result() { // To be "what is your next action" $fields = array(array("onto","What next?",$_POST[onto], type => "submit", options => "new|logout|next|". "previous|all|tailor|name")); $form = makeform($fields); return $form; } function run_query() { $result = ""; // Get where clauses $wheres = array(); foreach ($_SESSION[config]["whereopt:"] as $orow) { $testtypes = explode(" ",$orow); $testfield = array_shift($testtypes); foreach ($testtypes as $thistest) { if ($_SESSION["$testfield/$thistest"]) { switch ($thistest) { case "is": $wcl = "$testfield = \"". addslashes($_SESSION["$testfield/$thistest"]). "\""; break; case "contains": $wcl = "$testfield like \"%". addslashes($_SESSION["$testfield/$thistest"]). "%\""; break; case "lessthan": $wcl = "$testfield < ". addslashes($_SESSION["$testfield/$thistest"]); break; case "greaterthan": $wcl = "$testfield > ". addslashes($_SESSION["$testfield/$thistest"]); break; default: $wcl = "1 = 1"; // We know we have a problem is we see this reported break; } array_push($wheres,$wcl); } } } $wherestring = implode(" and ",$wheres); if ($wherestring) $wherestring = " where $wherestring"; // Get Base query $basequery = $_SESSION[config]["basequery:"][0]; // Get Column list $whats = array(); foreach ($_SESSION[config]["displayopt:"] as $ocol) { $testtypes = explode(" ",$ocol); $colwant = array_shift($testtypes); $defcol = array_shift($testtypes); if ($defcol == "never") continue; if ($defcol == "always") { array_push($whats,$colwant); continue; } if ($_SESSION["$colwant/display"]) { array_push($whats,$colwant); } } $whatstring = implode(", ",$whats); if ($whatstring == "") $whatstring = "*"; // Make up complete query $query = "select $whatstring from $basequery $wherestring"; sql_connect(); $rset = sql_query($query); $result .= "Running <b>".htmlspecialchars($query)."</b><br><br>"; $result .= "<table border=1>"; while ($row = sql_fetch($rset)) { $rowcount++; if ($rowcount < 2) { // header row $result .= "<tr>"; foreach (array_keys($row) as $col) { $result .= cell($col,"head"); } $result .= "</tr>"; } $result .= "<tr>"; foreach (array_keys($row) as $col) { $result .= cell($row[$col]); } $result .= "</tr>"; } $result .= "</table>"; return $result; } function validate_results() { // What to do next? if ($_POST[onto] == "logout") return "logout"; return "new"; } function store_results() { } ?> Learn about this subject
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