<?php
$input = '20-5*2/30+9=';
$inputLength = mb_strlen($input);
$number = 0;
$result = 0;
$op = '';
for ($i = 0; $i < $inputLength; $i++) {
$char = mb_substr($input, $i, 1);
if ($char == '*' || $char == '+' || $char == '-' || $char == '=' || $char == '/') {
if ($op == '') {
$result = $number;
} elseif ($op == '+') {
$result += $number;
} elseif ($op == '-') {
$result -= $number;
} elseif ($op == '*') {
$result *= $number;
} elseif ($op == '/') {
$result /= $number;
}
echo "op[$op] result[$result] number[$number] char[$char] \n";
$op = $char;
$number = 0;
if ($char == '=') {
echo "Ответ: $input$result";
}
} elseif (is_numeric($char) || $char == '.') {
$number = $number * 10 + intval($char);
} else {
echo "Неверный символ:'$char\n";
exit();
}
}
- Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
- op[] result[20] number[20] char[-]
op[-] result[15] number[5] char[*]
op[*] result[30] number[2] char[/]
op[/] result[1] number[30] char[+]
op[+] result[10] number[9] char[=]
Ответ: 20-5*2/30+9=10
- Output for 8.3.5
- Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
op[] result[20] number[20] char[-]
op[-] result[15] number[5] char[*]
op[*] result[30] number[2] char[/]
op[/] result[1] number[30] char[+]
op[+] result[10] number[9] char[=]
Ответ: 20-5*2/30+9=10
preferences:
176.28 ms | 402 KiB | 198 Q