PHP Program to Safe Division with Explanation
PHP
Easy
PHP Error Handling
36 views
1 min read
82 words
This problem helps you practice core PHP fundamentals in a practical way. It builds intuition around divide_by_zero, safe, division. Let’s break it down step by step so you can implement it confidently.
Problem Statement
Print a/b as integer. If b is 0, print DIVIDE_BY_ZERO.
Input Format
One line: a b.
Output Format
Quotient or DIVIDE_BY_ZERO.
Constraints
|a|,|b|
Code Solution
This explanation is written for learning purposes and to help beginners understand the concept clearly.
<?php
$inputText=trim(stream_get_contents(STDIN));
if($inputText==='') exit;
[$a,$b]=array_map('intval',preg_split('/\\s+/', $inputText));
if($b===0) echo 'DIVIDE_BY_ZERO';
else echo intdiv($a,$b);
?>
Common Mistakes
- Misreading input/output format.
- Not handling constraints and edge cases.
- Off-by-one errors in loops.
- Forgetting to reset variables between test cases (if any).
Solution Guide
Problem
Print a/b as integer. If b is 0, print DIVIDE_BY_ZERO.
Input / Output
Output
Quotient or DIVIDE_BY_ZERO.
Details
Common Mistakes
- Misreading input/output format.
- Not handling constraints and edge cases.
- Off-by-one errors in loops.
- Forgetting to reset variables between test cases (if any).
Official Solution
<?php
$inputText=trim(stream_get_contents(STDIN));
if($inputText==='') exit;
[$a,$b]=array_map('intval',preg_split('/\\s+/', $inputText));
if($b===0) echo 'DIVIDE_BY_ZERO';
else echo intdiv($a,$b);
?>
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