PHP Program to Word Count with Explanation
PHP
Easy
PHP Strings
35 views
1 min read
83 words
This problem helps you practice core PHP fundamentals in a practical way. It builds intuition around word, count, one. Let’s break it down step by step so you can implement it confidently.
Problem Statement
Count how many words are in the string (words separated by spaces).
Input Format
One line string s.
Output Format
One integer count.
Constraints
|s|
Code Solution
This explanation is written for learning purposes and to help beginners understand the concept clearly.
<?php
$inputText=rtrim(stream_get_contents(STDIN));
if($inputText==='') exit;
$inputText=trim($inputText);
if($inputText===''){ echo 0; exit; }
$parts=preg_split('/\\s+/', $inputText);
echo count($parts);
?>
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
Count how many words are in the string (words separated by spaces).
Input / Output
Output
One integer count.
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
$inputText=rtrim(stream_get_contents(STDIN));
if($inputText==='') exit;
$inputText=trim($inputText);
if($inputText===''){ echo 0; exit; }
$parts=preg_split('/\\s+/', $inputText);
echo count($parts);
?>
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