codegen.php
ori (Ori Livneh)
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	ori
	Aug 15 2020, 5:52 PM

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codegen.php
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	<?php
	// Generate randomized, self-verifying PHP code.
	function randomName() {
	$alpha = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_';
	$alphanum = $alpha . '0123456789';
	$s = $alpha[mt_rand(0, strlen($alpha)-1)];
	$len = mt_rand(1, 20);
	while(strlen($s) < $len) {
	$s .= $alphanum[mt_rand(0, strlen($alphanum)-1)];
	}
	return $s;
	}

	$className = randomName();
	$methodName = randomName();
	$arrayKey = randomName();
	$constName = randomName();
	$constValue = base64_encode(random_bytes(mt_rand(10, 100)));
	$propName = randomName();
	$propValue = base64_encode(random_bytes(mt_rand(10, 100)));
	$instName = randomName();
	$digest = md5($constValue.$propValue);

	echo <<<EOT
	<?php
	static \$arr = ["{$arrayKey}" => "{$digest}"];
	class ParentClass {
	protected function getKey(\$key) {
	global \$arr;
	return \$arr[\$key];
	}
	}
	class {$className} extends ParentClass {
	private const {$constName} = '{$constValue}';
	function __construct(\$prop) {
	\$this->{$propName} = \$prop;
	}
	function {$methodName}(\$key) {
	\$digest = \$this->getKey(\$key);
	if (md5(self::{$constName}.\$this->{$propName}) !== \$digest) {
	die("check error: md5(" .self::{$constName}.\$this->{$propName}.") != " . \$digest);
	}
	echo "OK\\n";
	}
	}
	\${$instName} = new {$className}("{$propValue}");
	\${$instName}->{$methodName}("{$arrayKey}");
	EOT;