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48
.gitignore vendored
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# Bootstrapping #
#################
/node_modules
/public/hot
/public/storage
/storage/*.key
/vendor
.env
.env.backup
.phpunit.result.cache
Homestead.json
Homestead.yaml
npm-debug.log
yarn-error.log
# OS generated files #
######################
.DS_Store
.DS_Store?
._*
.Spotlight-V100
.Trashes
Icon?
ehthumbs.db
Thumbs.db
.directory
# Tool specific files #
#######################
# vim
*~
*.swp
*.swo
# sublime text & textmate
*.sublime-*
*.stTheme.cache
*.tmlanguage.cache
*.tmPreferences.cache
# Eclipse
.settings/*
# JetBrains, aka PHPStorm, IntelliJ IDEA
.idea/*
# NetBeans
nbproject/*
# Visual Studio Code
.vscode
# Sass preprocessor
.sass-cache/

356
README.md
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# php-mysql # php-libmysqldriver
This is a simple abstraction library for MySQL DML operations. This library provides abstractions for parameter binding and result retrieval on MySQL(-like) databases in PHP. It is built on top of the PHP [`MySQL Improved`](https://www.php.net/manual/en/book.mysqli.php) extension.
For example: ## Install with Composer
```php
MySQL->from(string $table)
->where(?array ...$conditions)
->order(?array $order_by)
->limit(?int $limit = null, ?int $offset = null)
->select(string|array|null $columns = null): mysqli_result|bool;
```
which would be equivalent to the following in MySQL:
```sql
SELECT `columns` FROM `table` WHERE `filter` ORDER BY `order_by` LIMIT `limit`;
```
- All methods can be chained in any order (even multiple times) after a [`from()`](#from) as long as a [`select()`](#select), [`insert()`](#insert), [`update()`](#update), or [`delete()`](#delete) is the last method.
- Chaining the same method more than once will override its previous value. Passing `null` to any method that accepts it will unset its value completely.
## Install from composer
``` ```
composer require vlw/mysql composer require victorwesterlund/libmysqldriver
``` ```
```php ```php
use vlw\MySQL\MySQL; use libmysqldriver/MySQL;
``` ```
> [!IMPORTANT] ## Usage
> This library requires the [`MySQL Improved`](https://www.php.net/manual/en/book.mysqli.php) extension and PHP 8.0 or newer.
# Example / Documentation Connect to a MySQL database
Available statements
Statement|Method
--|--
`SELECT`|[`select()`](#select)
`UPDATE`|[`update()`](#update)
`INSERT`|[`insert()`](#insert)
`DELETE`|[`delete()`](#delete)
`WHERE`|[`where()`](#where)
`ORDER BY`|[`order()`](#order-by)
`LIMIT`|[`limit()`](#limit)
----
`Example table name: beverages`
id|beverage_type|beverage_name|beverage_size
--|--|--|--
0|coffee|cappuccino|10
1|coffee|black|15
2|tea|green|10
3|tea|black|15
```php ```php
use vlw\MySQL\MySQL; use libysqldriver/MySQL;
// Pass through: https://www.php.net/manual/en/mysqli.construct.php $db = new MySQL(
$db = new MySQL($host, $user, $pass, $db); "localhost:3306",
"username",
"password",
"database"
);
``` ```
All executor methods [`select()`](#select), [`update()`](#update), and [`insert()`](#insert) will return a [`mysqli_result`](https://www.php.net/manual/en/class.mysqli-result.php) object or boolean. Return matching rows from query (array of arrays)
# FROM
```php ```php
MySQL->from( $sql = "SELECT foo FROM table WHERE bar = ? AND biz = ?;
string $table
): self;
```
All queries start by chaining the `from(string $table)` method. This will define which database table the current query should be executed on. $response = $db->return_array($sql, [
"parameter_1",
*Example:* "parameter_2
```php
MySQL->from("beverages")->select("beverage_type");
```
# SELECT
Chain `MySQL->select()` anywhere after a [`MySQL->from()`](#from) to retrieve columns from a database table.
Pass an associative array of strings, CSV string, or null to this method to filter columns.
```php
MySQL->select(
string|array|null $columns
): mysqli_result|bool;
```
In most cases you probably want to select with a constraint. Chain the [`where()`](#where) method before `select()` to filter the query
### Example
```php
$`beverages` = MySQL->from("beverages")->select(["beverage_name", "beverage_size"]); // SELECT `beverage_name`, `beverage_size` FROM beverages
```
```
[
[
"beverage_name" => "cappuccino",
"beverage_size" => 10
],
[
"beverage_name" => "black",
"beverage_size" => 15
],
// ...etc
]
```
# INSERT
Chain `MySQL->insert()` anywhere after a [`MySQL->from()`](#from) to append a new row to a database table.
Passing a sequential array to `insert()` will assume that you wish to insert data for all defined columns in the table. Pass an associative array of `[column_name => value]` to INSERT data for specific columns (assuming the other columns have a [DEFAULT](https://dev.mysql.com/doc/refman/8.0/en/data-type-defaults.html) value defined).
```php
MySQL->insert(
// Array of values to INSERT
array $values
): bool
// Returns true if row was inserted
```
#### Example
```php
MySQL->from("beverages")->insert([
null,
"coffee",
"latte",
10
]);
// INSERT INTO `beverages` VALUES (null, "coffee", "latte", 10);
```
```
true
```
# DELETE
Chain `MySQL->delete()` anywhere after a [`MySQL->from()`](#from) to remove a row or rows from the a database table.
```php
MySQL->delete(
array ...$conditions
): bool
// Returns true if at least one row was deleted
```
This method takes at least one [`MySQL->where()`](#where)-syntaxed argument to determine which row or rows to delete. Refer to the [`MySQL->where()`](#where) section for more information.
#### Example
```php
MySQL->from("beverages")->delete([
"beverage_name" => "coffee",
]);
// DELETE FROM `beverages` WHERE `beverage_name` = "coffee";
```
```
true
```
# UPDATE
Chain `MySQL->update()` anywhere after a [`MySQL->from()`](#from) to modify existing rows in a database table.
```php
MySQL->update(
// Key, value array of column names and values to update
array $fields,
): mysqli_result|bool;
// Returns true if at least 1 row was changed
```
### Example
```php
MySQL->from("beverages")->update(["beverage_size" => 10]); // UPDATE `beverages` SET `beverage_size` = 10
```
```php
true
```
In most cases you probably want to UPDATE against a constaint. Chain a [`where()`](#where) method before [`MySQL->update()`](#update) to set constraints
# WHERE
Filter a [`MySQL->select()`](#select) or [`MySQL->update()`](#update) method by chaining the `MySQL->where()` method anywhere before it. The [`MySQL->delete()`](#delete) executor method also uses the same syntax for its arguments.
Each key, value pair will be `AND` constrained against each other.
```php
MySQL->where(
?array ...$conditions
): self;
```
### Example
```php
$coffee = MySQL->from("beverages")->where(["beverage_type" => "coffee"])->select(["beverage_name", "beverage_size"]); // SELECT `beverage_name`, `beverage_size` FROM `beverages` WHERE (`beverage_type` = "coffee");
```
```php
[
[
"beverage_name" => "cappuccino",
"beverage_size" => 10
],
[
"beverage_name" => "black",
"beverage_size" => 15
]
]
```
## Capture groups
### AND
Add additional key value pairs to an array passed to `where()` and they will all be compared as AND with each other.
```php
MySQL->where([
"beverage_type" => "coffee",
"beverage_size" => 15
]);
```
```sql
WHERE (`beverage_type` = 'coffee' AND `beverage_size` = 15)
```
### OR
Passing an additional array of key values as an argument will OR it with all other arrays passed.
```php
$filter1 = [
"beverage_type" => "coffee",
"beverage_size" => 15
]; ];
$filter2 = [ // Example $response with two matching rows: [["hello"],["world"]]
"beverage_type" => "tea", ```
"beverage_name" => "black"
Return boolean if query matched at least one row, or if != `SELECT` query was sucessful
```php
$sql = "INSERT INTO table (foo, bar) VALUES (?, ?);
$response = $db->return_bool($sql, [
"baz",
"qux"
]; ];
MySQL->where($filter1, $filter2, ...); // Example $response if sucessful: true
```
```sql
WHERE (`beverage_type` = 'coffee' AND `beverage_size` = 15) OR (`beverage_type` = 'tea' AND `beverage_name` = 'black')
```
## Define custom operators
By default, all values in an the assoc array passed to `where()` will be treated as an `EQUALS` (=) operator.
```php
MySQL->where(["column" => "euqals_this_value"]);
```
Setting the value of any key to another assoc array will allow for more "advanced" filtering by defining your own [`Operators`](https://github.com/VictorWesterlund/php-libmysqldriver/blob/master/src/Operators.php).
The key of this subarray can be any MySQL operator string, or the **->value** of any case in the [`Operators`](https://github.com/VictorWesterlund/php-libmysqldriver/blob/master/src/Operators.php) enum.
```php
MySQL->where([
"beverage_name" => [
Operators::LIKE->value => "%wildcard_contains%"
]
]);
```
# ORDER BY
Chain the `MySQL->order()` method before a [`MySQL->select()`](#select) statement to order by a specific column
```php
MySQL->order(
?array $order_by
): self;
```
```php
$coffee = MySQL->from("beverages")->order(["beverage_name" => "ASC"])->select(["beverage_name", "beverage_size"]); // SELECT `beverage_name`, `beverage_size` FROM `beverages` ORDER BY `beverage_name` ASC
```
```php
[
[
"beverage_name" => "tea",
"beverage_size" => 10
],
[
"beverage_name" => "tea",
"beverage_size" => 15
],
// ...etc for "`beverage_name` = coffee"
]
```
# LIMIT
Chain the `limit()` method before a [`MySQL->select()`](#select) statement to limit the amount of columns returned
```php
MySQL->limit(
?int $limit,
?int $offset = null
): self;
```
## Passing a single integer argument
This will simply `LIMIT` the results returned to the integer passed
```php
$coffee = MySQL->from("beverages")->limit(1)->select(["beverage_name", "beverage_size"]); // SELECT `beverage_name`, `beverage_size` FROM `beverages` WHERE `beverage_type` = "coffee" LIMIT 1
```
```php
[
[
"beverage_name" => "cappuccino",
"beverage_size" => 10
]
]
```
## Passing two integer arguments
This will `OFFSET` and `LIMIT` the results returned. The first argument will be the `LIMIT` and the second argument will be its `OFFSET`.
```php
$coffee = MySQL->from("beverages")->limit(3, 2)->select(["beverage_name", "beverage_size"]); // SELECT `beverage_name`, `beverage_size` FROM `beverages` LIMIT 3 OFFSET 2
```
```php
[
[
"beverage_name" => "tea",
"beverage_size" => 10
],
[
"beverage_name" => "tea",
"beverage_size" => 15
],
// ...etc
]
```

10
composer.json
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{ {
"name": "vlw/mysql", "name": "victorwesterlund/libmysqldriver",
"description": "Abstraction library for common MySQL/MariaDB DML operations with php-mysqli", "description": "Abstraction library for common mysqli features",
"type": "library", "type": "library",
"license": "GPL-3.0-or-later", "license": "GPL-3.0-only",
"authors": [ "authors": [
{ {
"name": "Victor Westerlund", "name": "Victor Westerlund",
"email": "victor@vlw.se" "email": "victor.vesterlund@gmail.com"
} }
], ],
"minimum-stability": "dev", "minimum-stability": "dev",
"autoload": { "autoload": {
"psr-4": { "psr-4": {
"vlw\\MySQL\\": "src/" "libmysqldriver\\": "src/"
} }
}, },
"require": {} "require": {}

18
composer.lock generated
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{
"_readme": [
"This file locks the dependencies of your project to a known state",
"Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
"This file is @generated automatically"
],
"content-hash": "aa59b0c90afdd92fd11d1cbc9352676c",
"packages": [],
"packages-dev": [],
"aliases": [],
"minimum-stability": "dev",
"stability-flags": [],
"prefer-stable": false,
"prefer-lowest": false,
"platform": [],
"platform-dev": [],
"plugin-api-version": "2.0.0"
}

352
src/MySQL.php
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<?php <?php
namespace vlw\MySQL; namespace libmysqldriver;
use Exception; class MySQL extends \mysqli {
function __construct(
use mysqli; // From: https://www.php.net/manual/en/mysqli.construct.php
use mysqli_stmt; string|null $host = null,
use mysqli_result; string|null $user = null,
string|null $pass = null,
use vlw\MySQL\Order; string|null $db = null
use vlw\MySQL\Operators; ) {
parent::__construct($host, $user, $pass, $db);
require_once "Order.php";
require_once "Operators.php";
// Interface for MySQL_Driver with abstractions for data manipulation
class MySQL extends mysqli {
public ?array $columns = null;
protected string $table;
protected ?string $limit = null;
protected ?string $order_by = null;
protected array $filter_columns = [];
protected array $filter_values = [];
protected ?string $filter_sql = null;
// Pass constructor arguments to driver
function __construct() {
parent::__construct(...func_get_args());
} }
/* // Bind SQL statements
# Helper methods private function bind_params(\mysqli_stmt &$stmt, mixed $params) {
*/ // Make single-value, non-array, param an array with length of 1
if (gettype($params) !== "array") {
private function throw_if_no_table() { $params = [$params];
if (!isset($this->table)) {
throw new Exception("No table name defined");
}
}
// Coerce input to single dimensional array
private static function to_list_array(mixed $input): array {
return array_values(is_array($input) ? $input : [$input]);
}
// Convert value to MySQL tinyint
private static function filter_boolean(mixed $value): int {
return (int) filter_var($value, FILTER_VALIDATE_BOOLEAN);
}
// Convert all boolean type values to tinyints in array
private static function filter_booleans(array $values): array {
return array_map(fn(mixed $v): mixed => gettype($v) === "boolean" ? self::filter_boolean($v) : $v, $values);
}
private static function array_wrap_accents(array $input): array {
return array_map(fn(mixed $v): string => "`{$v}`", $input);
}
/*
# Definers
These methods are used to build an SQL query by chaining methods together.
Defined parameters will then be executed by an Executer method.
*/
// Use the following table name
public function from(string $table): self {
// Reset all definers when a new query begins
$this->where();
$this->limit();
$this->order();
$this->table = $table;
return $this;
}
#[\Deprecated(
message: "use MySQL->from() instead",
since: "3.5.7",
)]
public function for(string $table): self {
return $this->from($table);
}
// Create a WHERE statement from filters
public function where(?array ...$conditions): self {
// Unset filters if null was passed
if ($conditions === null) {
$this->filter_sql = null;
$this->filter_columns = null;
$this->filter_values = null;
return $this;
} }
$values = []; // Concatenated string with types for each param
$filters = []; $types = "";
// Group each condition into an AND block if (!empty($params)) {
foreach ($conditions as $condition) { // Convert PHP primitve to SQL primitive for params
$filter = []; foreach ($params as $param) {
switch (gettype($param)) {
case "integer":
case "double":
case "boolean":
$types .= "i";
break;
// Move along if the condition is empty case "string":
if (empty($condition)) { case "array":
continue; case "object":
} $types .= "s";
break;
// Create SQL string and append values to array for prepared statement default:
foreach ($condition as $col => $operation) { $types .= "b";
$this->filter_columns[] = $col; break;
// Assume we want an equals comparison if value is not an array
if (!is_array($operation)) {
$operation = [Operators::EQUALS->value => $operation];
}
// Resolve all operator enum values in inner array
foreach ($operation as $operator => $value) {
// Null values have special syntax
if (is_null($value)) {
// Treat anything that isn't an equals operator as falsy
if ($operator !== Operators::EQUALS->value) {
$filter[] = "`{$col}` IS NOT NULL";
continue;
}
$filter[] = "`{$col}` IS NULL";
continue;
}
// Create SQL for prepared statement
$filter[] = "`{$col}` {$operator} ?";
// Append value to array with all other values
$values[] = $value;
} }
} }
// AND together all conditions into a group $stmt->bind_param($types, ...$params);
$filters[] = "(" . implode(" AND ", $filter) . ")"; }
}
// Execute an SQL query with a prepared statement
private function run_query(string $sql, mixed $params = null): \mysqli_result|bool {
$stmt = $this->prepare($sql);
// Bind parameters if provided
if ($params !== null) {
$this->bind_params($stmt, $params);
} }
// Do nothing if no filters were set // Execute statement and get affected rows
if (empty($filters)) { $query = $stmt->execute();
return $this; $res = $stmt->get_result();
// Return true if an INSERT, UPDATE or DELETE was sucessful (no rows returned)
if (!empty($query) && empty($res)) {
return true;
} }
// OR all filter groups // Return mysqli_result object
$this->filter_sql = implode(" OR ", $filters); return $res;
// Set values property
$this->filter_values = $values;
return $this;
} }
// SQL LIMIT string /* ---- */
public function limit(?int $limit = null, ?int $offset = null): self {
// Unset row limit if null was passed // Create comma separated list (CSV) from array
if ($limit === null) { private static function csv(array $values): string {
$this->limit = null; return implode(",", $values);
return $this; }
// Create CSV from columns
public static function columns(array|string $columns): string {
return is_array($columns)
? (__CLASS__)::csv($columns)
: $columns;
}
// Return CSV of '?' for use with prepared statements
public static function values(array|string $values): string {
return is_array($values)
? (__CLASS__)::csv(array_fill(0, count($values), "?"))
: "?";
}
/* ---- */
// Get result as an associative array
public function return_array(string $sql, mixed $params = null): array {
$query = $this->run_query($sql, $params);
$res = [];
while ($data = $query->fetch_assoc()) {
$res[] = $data;
} }
// Coerce offset to zero if no offset is defined return $res;
$offset = $offset ?? 0;
// Set limit and offset as SQL CSV
$this->limit = "{$offset},{$limit}";
return $this;
} }
// Return SQL SORT BY string from assoc array of columns and direction // Get only whether a query was sucessful or not
public function order(?array $order_by = null): self { public function return_bool(string $sql, mixed $params = null): bool {
// Unset row order by if null was passed $query = $this->run_query($sql, $params);
if ($order_by === null) {
$this->order_by = null; // Return query if it's already a boolean
return $this; if (gettype($query) === "boolean") {
return $query;
} }
// Assign Order Enum entries from array of arrays<Order|string> return $query->num_rows > 0 ? true : false;
$orders = array_map(fn(Order|string $order): Order => $order instanceof Order ? $order : Order::tryFrom($order), array_values($order_by));
// Create CSV string with Prepared Statement abbreviations from length of fields array.
$sql = array_map(fn(string $column, Order|string $order): string => "`{$column}` " . $order->value, array_keys($order_by), $orders);
$this->order_by = implode(",", $sql);
return $this;
}
/*
# Executors
These methods execute various statements that each return a mysqli_result
*/
// Create Prepared Statament for SELECT with optional WHERE filters
public function select(array|string|null $columns = null): mysqli_result|bool {
$this->throw_if_no_table();
// Create array of columns from CSV
$this->columns = is_array($columns) || is_null($columns) ? $columns : explode(",", $columns);
// Create CSV from columns or default to SQL NULL as a string
$columns_sql = $this->columns ? implode(",", self::array_wrap_accents($this->columns)) : "NULL";
// Create LIMIT statement if argument is defined
$limit_sql = !is_null($this->limit) ? " LIMIT {$this->limit}" : "";
// Create ORDER BY statement if argument is defined
$order_by_sql = !is_null($this->order_by) ? " ORDER BY {$this->order_by}" : "";
// Get array of SQL WHERE string and filter values
$filter_sql = !is_null($this->filter_sql) ? " WHERE {$this->filter_sql}" : "";
// Interpolate components into an SQL SELECT statmenet and execute
$sql = "SELECT {$columns_sql} FROM `{$this->table}`{$filter_sql}{$order_by_sql}{$limit_sql}";
// Return mysqli_response of matched rows
return $this->execute_query($sql, self::to_list_array($this->filter_values));
}
// Create Prepared Statement for UPDATE using PRIMARY KEY as anchor
public function update(array $entity): mysqli_result|bool {
$this->throw_if_no_table();
// Create CSV string with Prepared Statement abbreviations from length of fields array.
$changes = array_map(fn($column) => "`{$column}` = ?", array_keys($entity));
$changes = implode(",", $changes);
// Get array of SQL WHERE string and filter values
$filter_sql = !is_null($this->filter_sql) ? " WHERE {$this->filter_sql}" : "";
// Get values from entity and convert booleans to tinyint
$values = self::filter_booleans(array_values($entity));
// Append values to filter property if where() was chained
if ($this->filter_values) {
array_push($values, ...$this->filter_values);
}
// Interpolate components into an SQL UPDATE statement and execute
$sql = "UPDATE `{$this->table}` SET {$changes} {$filter_sql}";
return $this->execute_query($sql, self::to_list_array($values));
}
// Create Prepared Statemt for INSERT
public function insert(array $values): mysqli_result|bool {
$this->throw_if_no_table();
/*
Use array keys from $values as columns to insert if array is associative.
Treat statement as an all-columns INSERT if the $values array is sequential.
*/
$columns = !array_is_list($values) ? "(" . implode(",", array_keys($values)) . ")" : "";
// Convert booleans to tinyint
$values = self::filter_booleans($values);
// Create CSV string with Prepared Statement abbreviatons from length of fields array.
$values_stmt = implode(",", array_fill(0, count($values), "?"));
// Interpolate components into an SQL INSERT statement and execute
$sql = "INSERT INTO `{$this->table}` {$columns} VALUES ({$values_stmt})";
return $this->execute_query($sql, self::to_list_array($values));
}
// Create Prepared Statemente for DELETE with WHERE condition(s)
public function delete(array ...$conditions): mysqli_result|bool {
$this->throw_if_no_table();
// Set DELETE WHERE conditions from arguments
if ($conditions) {
$this->where(...$conditions);
}
// Get array of SQL WHERE string and filter values
$filter_sql = !is_null($this->filter_sql) ? " WHERE {$this->filter_sql}" : "";
$sql = "DELETE FROM `{$this->table}`{$filter_sql}";
return $this->execute_query($sql, self::to_list_array($this->filter_values));
}
// Execute SQL query with optional prepared statement and return mysqli_result
public function exec(string $sql, mixed $params = null): mysqli_result {
return $this->execute_query($sql, self::to_list_array($params));
} }
} }

46
src/Operators.php
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<?php
namespace vlw\MySQL;
enum Operators: string {
// Logical
case ALL = "ALL";
case AND = "AND";
case ANY = "ANY";
case BETWEEN = "BETWEEN";
case EXISTS = "EXISTS";
case IN = "IN";
case LIKE = "LIKE";
case NOT = "NOT";
case OR = "OR";
case SOME = "SOME";
// Comparison
case EQUALS = "=";
case GT = ">";
case LT = "<";
case GTE = ">=";
case LTE = "<=";
case NOTE = "<>";
// Arithmetic
case ADD = "+";
case SUBTRACT = "-";
case MULTIPLY = "*";
case DIVIDE = "/";
case MODULO = "%";
// Bitwise
case BS_AND = "&";
case BS_OR = "|";
case BS_XOR = "^";
// Compound
case ADDE = "+=";
case SUBE = "-=";
case DIVE = "/=";
case MODE = "%=";
case BS_ANDE = "&=";
case BS_ORE = "|*=";
case BS_XORE = "^-=";
}

8
src/Order.php
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<?php
namespace vlw\MySQL;
enum Order: string {
case ASC = "ASC";
case DESC = "DESC";
}