How many palindrome numbers are in the middle of PHP output two digits

This article mainly introduces the PHP output of two numbers in the middle of how many palindrome number method, example analysis of palindrome number concept and related judgment skills, the need for friends can refer to the

This article illustrates how many palindrome numbers are in the middle of a two-digit PHP output. Share to everyone for your reference. The specific analysis is as follows:

"Palindrome number" is a number. such as: 98789, this number is reading is 98789, the inverted reading is also 98789, is read and read backwards, so this number is palindrome number.

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<?php for ($i =10 $i <100; $i + +) {$len =strlen ($i); $l =1; $k =intval ($len)/2+1; for ($j =0; $j < $k; $j + +) {if substr ($ I, $j, 1)!=substr ($i, $len-$j -1,1)) $l = 0; Break if ($l ==1) echo $i. ' <br> '; }?>

I hope this article will help you with your PHP program design.