11 lines
222 B
PHP
11 lines
222 B
PHP
<?php
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function eval_with_x($code, $a, $b) {
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$x = $a;
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$first = eval($code);
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$x = $b;
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$second = eval($code);
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return $second - $first;
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}
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echo eval_with_x('return 3 * $x;', 5, 10), "\n"; # Prints "15".
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?>
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