ytkhs · December 16, 2015 02:03
diff --git a/file0.php b/file0.php
 // これを
 $x = ['PHP', 'Ruby', 'Perl'];

 // こうしたい
 $x = ['PHP', 'Perl', 'Ruby'];
diff --git a/file1.php b/file1.php
 // まともに入れ替える
 $temp = $x[1];
 $x[1] = $x[2];
 $x[2] = $temp;

 var_dump($x);
diff --git a/file2.txt b/file2.txt
 array(3) {
  [0]=>
  string(3) "PHP"
  [1]=>
  string(4) "Perl"
  [2]=>
  string(4) "Ruby"
 }
diff --git a/file3.php b/file3.php
 list($x[0], $x[2], $x[1]) = $x;
diff --git a/file4.txt b/file4.txt
 array(3) {
  [0] =>
  string(3) "PHP"
  [1] =>
  string(4) "Perl"
  [2] =>
  string(4) "Perl"
 }
diff --git a/file5.php b/file5.php
 //PHP 7.0.0RC6
 list($x[0], $x[2], $x[1]) = $x;
diff --git a/file6.txt b/file6.txt
 array(3) {
  [0] =>
  string(3) "PHP"
  [1] =>
  string(4) "Ruby"
  [2] =>
  string(4) "Ruby"
 }
diff --git a/file7.php b/file7.php
 list($x[0], $x[1], $x[2]) = [$x[0], $x[2], $x[1]];
 // または
 list($x[0], $x[2], $x[1]) = $x + [];
diff --git a/file8.txt b/file8.txt
 // PHP5, PHP7どちらでも同じ結果
 array(3) {
  [0] =>
  string(3) "PHP"
  [1] =>
  string(4) "Perl"
  [2] =>
  string(4) "Ruby"
 }
diff --git a/file9.php b/file9.php
 // PHPではこういう書き方ができない
 $x[0], $x[1], $x[2] = $x[0], $x[2], $x[1];
 # => PHP Parse error:  syntax error, unexpected ','
	// PHPではこういう書き方ができない
	$x[0], $x[1], $x[2] = $x[0], $x[2], $x[1];
	# => PHP Parse error: syntax error, unexpected ','