根据表结构自动生成一个PHP类
Zend framework提供了一种class和table映射起来的方式，创建一个继承Zend_Db_Table的class。查询时，zend自动将表字段做处理，生成一个对象，对象属性都是动态创建，所以是public的。这有两个大问题，一是class的属性是public，二是class的属性只有代码执行后才确定。于是乎，自己写了一个程序，根据表信息生成对应的class。
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<?php/** * 这个类的作用是从数据库里读出表结构，然后生成一个bean类，并将其属性与类一一映射。 * 具体生成的内容包括： * 1. 私有变量 * 2. 表字段与属性的映射关系 * 3. 表字段的信息，用于server的验证 */class TableClassGenerator { const DEFAULT_DIR = 'classes'; const DEFAULT_INDENT = 4; const DEFAULT_MIN = 2; private $excludedProperties; private $database; private $file; private $givenTables; private $parentClass; public function __construct($config) { if (!isset($config) || empty($config) || ! is_array($config)) { die('Invalid config: '. print_r($config, true)); } $this->database = $config['database']; $conn = isset($config['password']) ? mysql_connect($config['host'], $config['user'], $config['password']) : mysql_connect($config['host'], $config['user']); if (! isset($conn)) { die('Failed to connect.' . mysql_error()); } $this->givenTables = $config['tables']; if (isset($this->givenTables) && (!is_array($this->givenTables) || empty($this->givenTables))) { die("Tables($this->givenTables) in config is not an array or it is empty."); } $this->parentClass = $config['parentClass']; if ($config['excludedProperties']) { $this->excludedProperties = $config['excludedProperties']; if (!is_array($this->excludedProperties) || empty($this->excludedProperties)) { die('excludedProperties should be an array and shoudnot be empty.'); } } if (! file_exists(self::DEFAULT_DIR)) { mkdir(self::DEFAULT_DIR); } } public function __destroy() { mysql_close(); } public function generateClasses() { $allTables = $this->getTables(); var_dump($allTables); $tables = $this->givenTables ? $this->givenTables : $allTables; if (empty($tables)) { die("Empty given tables"); } foreach ($tables as $table) { $index = array_search($table, $allTables); if (!is_int($index)) { echo "Table($table) not found in database({$this->database}).\n"; continue; } $this->generateClassForTable($table); } } private function generateClassForTable($table) { $class = ucfirst($this->transform($table)); $fileName = self::DEFAULT_DIR . "/$class.php"; if (file_exists($fileName)) { echo "The file($fileName) already exists. You need delete if first.\n"; //return; } $columns = $this->getTableColumns($table); if (!isset($columns) || empty($columns)) { echo "The table($table) doesn't have columns.\n"; return; } $this->file = fopen($fileName, 'w'); if (! isset($this->file)) { die("Failed to open file: $fileName"); } echo "Generating class for table: $table.\n"; $this->writeToFile("<?php"); if ($this->parentClass) { $this->writeToFile("class $class extends {$this->parentClass} {"); } else { $this->writeToFile("class $class {"); } $this->generateConst($table); $this->generateColumnPropMapping($columns); $this->generateValidateConfig($table, $columns); $this->generateProperties($columns); $this->generateGetters($columns); $this->generateSetters($columns); $this->writeToFile("}"); $this->writeToFile("?>"); fclose($this->file); echo "Class($class) was created in the file($fileName).\n\n"; } private function generateColumnPropMapping($columns) { $this->writeToFile('private static $_colPropMapping = array(', 1); foreach ($columns as $key => $value) { $prop = $this->transform($key); $this->writeToFile("'$key' => '$prop',", 2); } $this->writeToFile(');', 1); $this->writeNewLine(); } private function generateConst($table) { $this->writeToFile("const TABLE_NAME = '$table';", 1); $this->writeNewLine(); } private function generateGetters($columns) { foreach ($columns as $key => $value) { $prop = $this->transform($key); if ($this->shouldExcludeProp($prop)) { continue; } $method = 'get' . ucfirst($prop); $this->writeToFile("public function $method() {", 1); $this->writeToFile('return $' . "this->$prop;", 2); $this->writeToFile("}", 1); $this->writeNewLine(); } } private function generateProperties($columns) { $keys = array_keys($columns); foreach ($keys as $key) { $prop = $this->transform($key); if ($this->shouldExcludeProp($prop)) { continue; } $this->writeToFile("private $prop;", 1); } $this->writeNewLine(); } private function generateSetters($columns) { foreach ($columns as $key => $value) { $prop = $this->transform($key); if ($this->shouldExcludeProp($prop)) { continue; } $method = 'set' . ucfirst($prop); $this->writeToFile("public function $method ($$prop) {", 1); $this->writeToFile('$' . "this->$prop = $" . "$prop;", 2); $this->writeToFile("}", 1); $this->writeNewLine(); } } private function generateValidateConfig($table, $columns) { $this->writeToFile('private static $_validator = array(', 1); $this->writeToFile("'$table' => array(", 2); foreach ($columns as $key => $value) { $this->writeToFile("'$key' => array(", 3); foreach ($value as $k => $v) { if (is_string($v)) { $this->writeToFile("'$k' => '$v',", 4); } else { $this->writeToFile("'$k' => $v,", 4); } } $this->writeToFile("),", 3); } $this->writeToFile("), // $table", 2); $this->writeToFile(');', 1); $this->writeNewLine(); } private function getMin($max, $type) { if (!isset($max)) { return null; } $min = self::DEFAULT_MIN; if ($type == 'date' || $min > $max) { $min = $max; } return $min; } public function getTableColumns($table) { $fields = mysql_list_fields($this->database, $table); $count = mysql_num_fields($fields); if (! isset($fields)) { die("Failed to get fields" . mysql_error()); } $columns = array(); for ($i = 0; $i < $count; $i++) { $flags = mysql_field_flags($fields, $i); $isRequired = preg_match('/not_null/', $flags); $col = mysql_field_name($fields, $i); $max = mysql_field_len($fields, $i); $type = mysql_field_type($fields, $i); $min = $this->getMin($max, $type); $columns[$col] = array( 'isRequired' => $isRequired, 'max' => $max, 'min' => $min, 'type' => $type, ); } $sortedColumns = array(); $keys = array_keys($columns); sort($keys); foreach ($keys as $key) { $sortedColumns[$key] = $columns[$key]; } return $sortedColumns; } private function getTables() { $sql = "SHOW TABLES FROM {$this->database}"; $result = mysql_query($sql); $tables = array(); for ($i = 0; $i < mysql_num_rows($result); $i++) { $tables[] = mysql_tablename($result, $i); } return $tables; } private function shouldExcludeProp($prop) { if (! isset($this->excludedProperties)) { return false; } $index = array_search($prop, $this->excludedProperties); return is_int($index); } private function transform($name) { $words = explode('_', $name); $newName = null; foreach ($words as $word) { if ($newName == null) { $newName = $word; } else { $newName .= ucfirst($word); } } return $newName; } private function writeNewLine() { $this->writeToFile(''); } private function writeToFile($str, $count = 0) { $space = null; $count *= self::DEFAULT_INDENT; while ($count) { if ($space == null) { $space = ' '; } else { $space .= ' '; } $count--; } fwrite($this->file, $space); fwrite($this->file, "$str\n"); }} // TableClassGenerator$gen = new TableClassGenerator(array( 'excludedProperties' => array('id', 'userId'), 'database' => 'mydb', 'host' => 'localhost', 'parentClass' => 'Base', 'password' => 'pwd', // 'tables' => array('user'), 'user' => 'userId',)); $gen->generateClasses();
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