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  1. $word = "malayalam";
  2.  
  3. $j = strlen ($word)-1;
  4. $pal = true;
  5.  
  6. for ($i = 0; $i < strlen($word)/2; ++$i, --$j) {
  7.  
  8.     // skip spaces
  9.     while ($word[$i] === " ") {$i++;}
  10.     while ($word[$j] === " ") {$j--;}
  11.  
  12.     echo "$word[$i]== $word[$j]\n";
  13.     if ($word[$i] !== $word[$j])    {
  14.         $pal = false;
  15.         break;
  16.         }
  17. }
Success #stdin #stdout 0.03s 26032KB
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stdin
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$word = "malayalam";

$j = strlen ($word)-1;
$pal = true;

for ($i = 0; $i < strlen($word)/2; ++$i, --$j) {

    // skip spaces
    while ($word[$i] === " ") {$i++;}
    while ($word[$j] === " ") {$j--;}

    echo "$word[$i]== $word[$j]\n";
    if ($word[$i] !== $word[$j])    {
        $pal = false;
        break;
        }
}

if ($pal) print "yes"; else print "no";
stdout
copy 
$word = "malayalam";

$j = strlen ($word)-1;
$pal = true;

for ($i = 0; $i < strlen($word)/2; ++$i, --$j) {

    // skip spaces
    while ($word[$i] === " ") {$i++;}
    while ($word[$j] === " ") {$j--;}

    echo "$word[$i]== $word[$j]\n";
    if ($word[$i] !== $word[$j])    {
        $pal = false;
        break;
        }
}
https://ideone.com/TfeebE
language:
PHP (php 7.3.5)
created:
9 days ago
visibility:
public

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