Fix error on php 8.1+

Add DBCacheQuery class to insert a large number of records using fewer queries
Little fixes

README.md

@@ -8,7 +8,7 @@ All methods available in both class types
 ```php
 use \Power\DB;
 
-// Non static
+// Non-static
 $db = new \Power\mDB('localhost', 'users', 'passwd', 'dbname', 'utf8mb4');
 // Select all records from users table
 $data = $db->getAll('SELECT * FROM ?n', 'users');
@@ -101,4 +101,26 @@ use \Power\DB;
 DB::Init('localhost', 'user', 'passwd', 'dbname', 'utf8mb4');
 DB::SetErrorLog(__DIR__.'/mysql_error.log');
 DB::SetLogSql(__DIR__.'/mysql_sql.log', false);
+```
+
+#### Use ``DBCacheQuery`` class to insert a large number of records using fewer queries
+```php
+// Create class and point table name and col names for inserting records
+$cache_items = new \DBCacheQuery('item_list', ['id', 'name', 'icon', 'list', 'data_type']);
+foreach ($some_data as $data)
+{
+ // Use Add method for each new row
+ // Make sure, that param array has the same data order as you make in class creation
+ $cache_items->Add(
+ [
+ $data['id'],
+ $data['name'],
+ $data['icon'],
+ $data['list'],
+ $data['type']
+ ]);
+}
+// Then use Flush method to send the remaining data from the cache
+$cache_items->Flush();
+// That's all
 ```

src/DB.php

@@ -399,7 +399,7 @@ public static function pure(string $sql): stdClass
  }
 
  /**
- * DONT'T USE - function in development
+ * DON'T USE - function in development
  * Make condition for where/having and other parameters
  *
  * Example:
@@ -420,4 +420,28 @@ public static function cond(string $field, string $operator, $value): string
  return self::instance()->parse('?n '.$operator.' '.$placeholder, $field, $value);
  }
 
+ public static function escapeParam($val)
+ {
+ if (is_int($val) || is_float($val)) {
+ return self::escapeInt($val);
+ }
+ if (is_object($val) && isset($val->sql)) {
+ return $val->sql;
+ }
+ return self::escapeString($val);
+ }
+
+ private static function escapeInt($value)
+ {
+ if ($value === NULL)
+ {
+ return 'NULL';
+ }
+ if (is_float($value))
+ {
+ $value = number_format($value, 6, '.', ''); // may lose precision on big numbers
+ }
+ return $value;
+ }
+
 }

src/DBCacheQuery.php

@@ -0,0 +1,50 @@
+<?php
+
+namespace Power;
+
+class DBCacheQuery
+{
+
+ private $fields;
+ private $table_name;
+ private $insert_ignore;
+ private $sql_cache = '';
+ private $query_size_limit;
+
+ public function __construct(string $table_name, array $field_names, bool $insert_ignore = false, int $query_size_limit = 250000)
+ {
+ $this->fields = $field_names;
+ $this->table_name = $table_name;
+ $this->insert_ignore = $insert_ignore;
+ $this->query_size_limit = $query_size_limit;
+ }
+
+ public function Flush()
+ {
+ if ($this->sql_cache !== '') {
+ DB::query('?p;', $this->sql_cache);
+ }
+ $this->sql_cache = '';
+ }
+
+ public function Add(array $values)
+ {
+ if (strlen($this->sql_cache) >= $this->query_size_limit) {
+ $this->Flush();
+ }
+ $v = '';
+ foreach ($values as $val) {
+ if ($v !== '') {
+ $v .= ',';
+ }
+ $v .= DB::escapeParam($val);
+ }
+ if ($this->sql_cache === '') {
+ $f = '`' . implode('`,`', $this->fields) . '`';
+ $this->sql_cache = 'INSERT ' . ($this->insert_ignore ? 'IGNORE ' : '') . 'INTO `' . $this->table_name . '` (' . $f . ') VALUES (' . $v . ')';
+ } else {
+ $this->sql_cache .= ', (' . $v . ')';
+ }
+ }
+
+}

src/mDB.php

@@ -459,7 +459,7 @@ public function parse(string $sql, ...$arg): string
  *
  * @param string $input - field name to test
  * @param array $allowed - an array with allowed variants
- * @param string $default - optional variable to set if no match found. Default to false.
+ * @param string|bool $default - optional variable to set if no match found. Default to false.
  * @return string|bool - either sanitized value or FALSE
  */
  public function whiteList(string $input, array $allowed, $default=false)
@@ -625,13 +625,13 @@ public function prepareQuery($args):string
  $this->ConnectBase();
  $query = '';
  $raw = array_shift($args);
- $array = preg_split('~(\?[nsiuap])~u',$raw,null,PREG_SPLIT_DELIM_CAPTURE);
+ $array = preg_split('~(\?[nsiuap])~u',$raw,-1,PREG_SPLIT_DELIM_CAPTURE);
  $arguments_num = count($args);
  $placeholders_num = (int)floor(count($array) / 2);
  if ( $placeholders_num !== $arguments_num )
  {
  $this->ShowError("Number of args ($arguments_num) doesn't match number of placeholders ($placeholders_num) in [$raw]", true);
- die();
+ return '';
  }
 
  foreach ($array as $i => $part)
@@ -678,7 +678,7 @@ protected function escapeInt($value)
  if(!is_numeric($value))
  {
  $this->ShowError( "Integer (?i) placeholder expects numeric value, ".gettype($value)." given", true);
- die();
+ return '';
  }
  if (is_float($value))
  {
@@ -745,7 +745,7 @@ protected function createSET($data):string
  foreach ($data as $key => $value)
  {
  // Check if value is DB::pure object
- if (is_numeric($value))
+ if (is_int($value) || is_float($value))
  {
  $str = $this->escapeInt($value);
  } elseif (is_object($value) && isset($value->sql)) {