The Unless Statement

The {{unless}} Statement

Show content when a variable is not set — the inverse of {{isset}}.

Product 1 — discount + shipping note:

Product 2 — no discount, in stock:

Product 3 — out of stock, no discount:

<?php

# require the templating library
require '../vendors/ViewFish/viewfish.php';

# instantiate a ViewFish object
$T = new ViewFish\viewfish();

# set the template path
$T->set_template_path(__DIR__.'/../templates/');

# load the template
$template = $T->load_template("demo10");

# Product with discount and in stock
$product1 = [
    'title'         => 'wireless headphones',
    'price'         => '79.99',
    'discount'      => '20.00',
    'final_price'   => '59.99',
    'in_stock'      => '1',
    'shipping_note' => 'Free 2-day shipping for Prime members!',
];

# Product with no discount, in stock
$product2 = [
    'title'    => 'USB-C charging cable',
    'price'    => '12.99',
    'in_stock' => '1',
];

# Product out of stock, no discount
$product3 = [
    'title' => 'limited edition sneakers',
    'price' => '249.99',
];

echo "<h4>The <code>{{unless}}</code> Statement</h4>";
echo "<p>Show content when a variable is <em>not</em> set — the inverse of <code>{{isset}}</code>.</p><hr>";

echo "<h5>Product 1 — discount + shipping note:</h5>";
echo $T->render($template, $product1);

echo "<h5>Product 2 — no discount, in stock:</h5>";
echo $T->render($template, $product2);

echo "<h5>Product 3 — out of stock, no discount:</h5>";
echo $T->render($template, $product3);

<div class="card mb-3">
    <div class="card-body">
        <h5>{{title|ucwords}}</h5>
        {{unless $discount}}
            <p class="text-muted">No discount available. Regular price: ${{price}}</p>
        {{else}}
            <p class="text-success">&#x1F389; Discount applied! You save ${{discount}}. Pay only ${{final_price}}.</p>
        {{/unless}}
        {{unless $in_stock}}
            <p class="text-danger"><strong>Out of stock.</strong> Check back later.</p>
        {{/unless}}
        {{unless $shipping_note}}
            <p>Standard shipping applies.</p>
        {{else}}
            <p>&#x1F4E6; {{shipping_note}}</p>
        {{/unless}}
    </div>
</div>