# 3v4l.org

run code in 200+ php & hhvm versions
```<?php function validate_EAN13Barcode(\$barcode) { // check to see if barcode is 13 digits long if (!preg_match("/^[0-9]{13}\$/", \$barcode)) { return false; } \$digits = \$barcode; // 1. Add the values of the digits in the // even-numbered positions: 2, 4, 6, etc. \$even_sum = \$digits[1] + \$digits[3] + \$digits[5] + \$digits[7] + \$digits[9] + \$digits[11]; // 2. Multiply this result by 3. \$even_sum_three = \$even_sum * 3; // 3. Add the values of the digits in the // odd-numbered positions: 1, 3, 5, etc. \$odd_sum = \$digits[0] + \$digits[2] + \$digits[4] + \$digits[6] + \$digits[8] + \$digits[10]; // 4. Sum the results of steps 2 and 3. \$total_sum = \$even_sum_three + \$odd_sum; // 5. The check character is the smallest number which, // when added to the result in step 4, produces a multiple of 10. \$next_ten = (ceil(\$total_sum / 10)) * 10; \$check_digit = \$next_ten - \$total_sum; // if the check digit and the last digit of the // barcode are OK return true; if (\$check_digit == \$digits[12]) { return true; } return false; } echo "ean valide : ".validate_EAN13Barcode(3001209537341)."";```
Output for 4.3.0 - 7.2.0
ean valide : 1