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22 lines
390 B
PHP
22 lines
390 B
PHP
<?php
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/*
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* Gnieark's anwser to euler problem 4
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* https://projecteuler.net/problem=4
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*/
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$pal=0;
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for($i=1000;$i>99;$i--){
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for($j=1000;$j>99;$j--){
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$prod=$i*$j;
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if ((isPalindrome($prod)) && ($prod>$pal)) {
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$pal=$prod;
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}
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}
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}
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echo $pal;
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function isPalindrome($number){
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if(strrev(strval($number)) == strval($number)){
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return true;
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}
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} |