add csrf and method blade directives

src/Illuminate/View/Compilers/BladeCompiler.php

@@ -12,6 +12,7 @@ class BladeCompiler extends Compiler implements CompilerInterface
        Concerns\CompilesComponents,
        Concerns\CompilesConditionals,
        Concerns\CompilesEchos,
        Concerns\CompilesFormHelpers,
        Concerns\CompilesIncludes,
        Concerns\CompilesInjections,
        Concerns\CompilesJson,

src/Illuminate/View/Compilers/Concerns/CompilesFormHelpers.php

@@ -0,0 +1,27 @@
<?php

namespace Illuminate\View\Compilers\Concerns;

trait CompilesFormHelpers
{
    /**
     * Compile the CSRF statements into valid PHP.
     *
     * @return string
     */
    protected function compileCsrf()
    {
        return '<?php echo csrf_field(); ?>';
    }

    /*
     * Compile the method statements into valid PHP.
     *
     * @param  string  $method
     * @return string
     */
    protected function compileMethod($method)
    {
        return "<?php echo method_field{$method}; ?>";
    }
}

tests/View/Blade/BladeFormHelpersTest.php

@@ -0,0 +1,12 @@
<?php

namespace Illuminate\Tests\View\Blade;

class BladeFormHelpersTest extends AbstractBladeTestCase
{
    public function testEchosAreCompiled()
    {
        $this->assertEquals('<?php echo csrf_field(); ?>', $this->compiler->compileString('@csrf'));
        $this->assertEquals('<?php echo method_field(\'patch\'); ?>', $this->compiler->compileString("@method('patch')"));
    }
}