PHP の PSR-2 コーディング スタイル仕様 (コード) の詳細な紹介

<?php
namespace Vendor\Package;
use FooInterface;
use BarClass as Bar;
use OtherVendor\OtherPackage\BazClass;
class Foo extends Bar implements FooInterface
{
 public function sampleFunction($a, $b = null)
 {
 if ($a === $b) {
 bar();
 } elseif ($a > $b) {
 $foo->bar($arg1);
 } else {
 BazClass::bar($arg2, $arg3);
 }
 }
 final public static function bar()
 {
 // 方法的内容
 }
}

<?php

namespace Vendor\Package;
use FooClass;
use BarClass as Bar;
use OtherVendor\OtherPackage\BazClass;

<?php
namespace Vendor\Package;
use FooClass;
use BarClass as Bar;
use OtherVendor\OtherPackage\BazClass;
class ClassName extends ParentClass implements \ArrayAccess, \Countable
{
 // 这里面是常量、属性、类方法
}

<?php

namespace Vendor\Package;
use FooClass;
use BarClass as Bar;
use OtherVendor\OtherPackage\BazClass;
class ClassName extends ParentClass implements
 \ArrayAccess,
 \Countable,
 \Serializable
{
 // 这里面是常量、属性、类方法
}

<?php
namespace Vendor\Package;
class ClassName
{
 public $foo = null;
}

<?php
namespace Vendor\Package;
class ClassName
{
 public function fooBarBaz($arg1, &$arg2, $arg3 = [])
 {
 // method body
 }
}

<?php
namespace Vendor\Package;
class ClassName
{
 public function foo($arg1, &$arg2, $arg3 = [])
 {
 // method body
 }
}

<?php
namespace Vendor\Package;
class ClassName
{
 public function aVeryLongMethodName(
 ClassTypeHint $arg1,
 &$arg2,
 array $arg3 = []
 ) {
 // 方法的内容
 }
}

<?php
namespace Vendor\Package;
abstract class ClassName
{
 protected static $foo;
 abstract protected function zim();
 final public static function bar()
 {
 // method body
 }
}

<?php
bar();
$foo->bar($arg1);
Foo::bar($arg2, $arg3);
参数 可以 分列成多行，此时包括第一个参数在内的每个参数都 必须 单独成行。
<?php
$foo->bar(
 $longArgument,
 $longerArgument,
 $muchLongerArgument
);

<?php
if ($expr1) {
 // if body
} elseif ($expr2) {
 // elseif body
} else {
 // else body;
}

<?php
switch ($expr) {
 case 0:
 echo &#39;First case, with a break&#39;;
 break;
 case 1:
 echo &#39;Second case, which falls through&#39;;
 // no break
 case 2:
 case 3:
 case 4:
 echo &#39;Third case, return instead of break&#39;;
 return;
 default:
 echo &#39;Default case&#39;;
 break;
}

<?php
while ($expr) {
 // structure body
}

<?php
do {
 // structure body;
} while ($expr);

<?php
for ($i = 0; $i < 10; $i++) {
 // for body
}

<?php
foreach ($iterable as $key => $value) {
 // foreach body
}

<?php
try {
 // try body
} catch (FirstExceptionType $e) {
 // catch body
} catch (OtherExceptionType $e) {
 // catch body
}

<?php
$closureWithArgs = function ($arg1, $arg2) {
 // body
};
$closureWithArgsAndVars = function ($arg1, $arg2) use ($var1, $var2) {
 // body
};

<?php
$longArgs_noVars = function (
 $longArgument,
 $longerArgument,
 $muchLongerArgument
) {
 // body
};
$noArgs_longVars = function () use (
 $longVar1,
 $longerVar2,
 $muchLongerVar3
) {
 // body
};
$longArgs_longVars = function (
 $longArgument,
 $longerArgument,
 $muchLongerArgument
) use (
 $longVar1,
 $longerVar2,
 $muchLongerVar3
) {
 // body
};
$longArgs_shortVars = function (
 $longArgument,
 $longerArgument,
 $muchLongerArgument
) use ($var1) {
 // body
};
$shortArgs_longVars = function ($arg) use (
 $longVar1,
 $longerVar2,
 $muchLongerVar3
) {
 // body
};

<?php
$foo->bar(
 $arg1,
 function ($arg2) use ($var1) {
 // body
 },
 $arg3
);