Online PHP editor | rfc for 9ZIXg

@ 2014-10-28T10:57:50Z

<?php

class NamedInClause
{
    public $data;
    public $clause;

    public function __construct(array $array, $name = 'in') {
        $placeholders = array();
        $i = 0;

        $name = preg_replace('/[^a-z0-9_]+/', '', (string)$name);
        if (!preg_match('/^[a-z]/i', $name)) {
            throw new \InvalidArgumentException('Placeholder name ' . $name . ': must begin with a letter');
        }

        foreach ($array as $value) {
            $key = $name . $i++;
            $placeholders[] = ':' . $key;
            $this->data[$key] = $value;
        }

        $clause->string = implode(', ', $placeholders);
    }
}


$inClause = new NamedInClause([1, 2, 3], 'id');

// Build the query string
$query = "
  UPDATE table
  SET value1 = :val1, value2 = :val2
  WHERE id IN (" . $inClause->clause . ")
";

// Create the data array. Get an array of concrete values and merge the IN clause data
$data = array('val1' => 'Hello', 'val2' => 'World') + $inClause->data;

var_dump($query, $data);

/*
$stmt = $db->prepare($query);
$stmt->execute($data);
*/

Output for git.master, git.master_jit, rfc.property-hooks: Fatal error: Uncaught Error: Attempt to assign property "string" on null in /in/9ZIXg:23 Stack trace: #0 /in/9ZIXg(28): NamedInClause->__construct(Array, 'id') #1 {main} thrown in /in/9ZIXg on line 23
Process exited with code 255.

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