PHP Strings Demo

PHP Strings Tool

Main Text:
Hello World! Welcome to the world of PHP.

Find word:

Replace with:

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Results:

Text Length: 41 characters

Word Count: 8 words

New Text: Hello World! Welcome to the programming of PHP.

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CODE FOLLOWS

<?php
error_reporting(E_ALL);
include('includes/header.php');

// 1. Get user input with fallback defaults
$main_text    = $_POST['main_text'] ?? 'Hello World! Welcome to the world of PHP.';
$search_word  = $_POST['search_word'] ?? 'world';
$replace_word = $_POST['replace_word'] ?? 'programming';

// 2. Process the text
$text_length   = strlen($main_text);
$word_count    = str_word_count($main_text);

// 3. Condition: Check if the word exists in the text (case-sensitive)
// strpos() returns false if the word is not found
$word_found = (strpos($main_text, $search_word) !== false);

if ($word_found) {
    $replaced_text = str_replace($search_word, $replace_word, $main_text);
} else {
    $replaced_text = "Word not found! No changes were made.";
}

?>

<head>
    <meta charset="UTF-8">
    <title>PHP Strings Demo</title>
</head>

<body>
<h1>PHP Strings Demo</h1>
<h2>PHP Strings Tool</h2>

<!-- Form Section -->
<form action="" method="POST">
    <p>
        <label>Main Text:</label><br>
        <textarea name="main_text" rows="4" cols="40" required><?= htmlspecialchars($main_text) ?></textarea>
    </p>

    <p>
        <label>Find word:</label>
        <input type="text" name="search_word" value="<?= htmlspecialchars($search_word) ?>" required>
    </p>

    <p>
        <label>Replace with:</label>
        <input type="text" name="replace_word" value="<?= htmlspecialchars($replace_word) ?>" required>
    </p>

    <input type="submit" value="Submit">
</form>

<hr>

<!-- Results Section -->
<h3>Results:</h3>
<p><strong>Text Length:</strong> <?= $text_length ?> characters</p>
<p><strong>Word Count:</strong> <?= $word_count ?> words</p>

<p><strong>New Text:</strong>
    <?php if ($word_found): ?>
        <?= htmlspecialchars($replaced_text) ?>
    <?php else: ?>
        <!-- Displayed in red if the word isn't found -->
        <span style="color: red; font-style: italic;"><?= $replaced_text ?></span>
    <?php endif; ?>
</p>

</body>

<?php
include('includes/footer.php');
?>


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