PHP：为什么我收到这个错误？？？ “语法错误，意外'{'”

Question

i wanted to arrange this arrays element in assending order and wrote the below code:

<?php 
  $a=array("z","s","a","j","t","b");
  for($i=0;$i<=6;$i++)
  {
  if ($i[0]<$i[1]) { echo $i[1]; }
  else if ($i[1]<$i[2]) { echo $i[2]; }
  else if ($i[2]<$i[3]) { echo $i[3]; }
  else if ($i[3]<$i[4]) { echo $i[4]; }
  else if ($i[4]<$i[5]) { echo $i[5]; }
  else if ($i[5]<$i[6]) { echo $i[6]; }
  else if ($i[6]<$i[7]) { echo $i[7]; }
  else if ($i[7]<$i[8]) { echo $i[8]; }
  else if ($i[8]<$i[9]) { echo $i[9]; }
  else if ($i[9]<$i[10]) { echo $i[10]; }
  else if ($i[10]<$i[11]) { echo $i[11]; }
  else ($i[11]<$i[12]) { echo $i[12]; }

 }

?>

but i an getting the following error:

Parse error: syntax error, unexpected '{' in C:\wamp\www\arange.php on line 16

how can i rectify it

Answer 1

This snippet is the problem:

else ($i[11]<$i[12]) { echo $i[12]; }

Either edit it into elseif or remove the ($i[11]<$i[12]) .

Answer 2

I'd do this differently. Consider using PHP's built in sort() function.

$a = array("z","s","a","j","t","b");
sort($a);
foreach ($a as $element) {
    echo "$element\n";
}

Also read about the foreach statement .

Answer 3

if ($i[5]<$i[6]) { echo $i[6]; }

actually will output something like this;

if ( b < ) { echo ; } 

That why you see kinda error...

Answer 4

$b = '';
$a=array("z","s","a","j","t","b");
foreach($a as $i) if($i > $b) $b = $i;
echo $b;

Answer 5

Check out the manual for a clear example of the elseif/else if syntax. The else part in your code is the problem.