16 tasks, 1 summary
Learn how to create your own functions and use the built-in ones. We will explore how to use functions to sort, filter, copy, and shuffle arrays. We will finish the shipping status page and display random product listings on the main page of our store.
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</span></span></li></ol></aside></div><div class="page-content__right"><div class="chapter-description"><h1 class="chapter-description__title"><span>Chapter 3: </span>Arrays and functions in PHP</h1><div class="chapter-description__content chapter-description__content--theory"><div class="chapter-description__left"><span class="chapter-description__info">
16 tasks, 1 summary
</span><p class="chapter-description__text">Learn how to create your own functions and use the built-in ones. We will explore how to use functions to sort, filter, copy, and shuffle arrays. We will finish the shipping status page and display random product listings on the main page of our store.</p><div class="chapter-description__controls text-container"><a class="button button--green button--large button--wide" href="/continue/php-basics/php-arrays-functions">
Start </a><br><span class="chapter-description__controls-text"></span></div></div><div class="chapter-tasks"><div class="chapter-tasks__item"><a class="chapter-tasks__link" href="/courses/php-basics/php-arrays-functions/display-products"><span class="chapter-tasks__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/general.svg#chapter_arrow"></use></svg></span><span class="chapter-tasks__title">1. Display all of the products from the order on the page</span><span class="chapter-tasks__type">
Task
</span></a></div><div class="chapter-tasks__item"><a class="chapter-tasks__link" href="/courses/php-basics/php-arrays-functions/declare-call-function"><span class="chapter-tasks__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/general.svg#chapter_arrow"></use></svg></span><span class="chapter-tasks__title">2. Declare and call the function</span><span class="chapter-tasks__type">
Task
</span></a></div><div class="chapter-tasks__item"><a class="chapter-tasks__link" href="/courses/php-basics/php-arrays-functions/function-argiments"><span class="chapter-tasks__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/general.svg#chapter_arrow"></use></svg></span><span class="chapter-tasks__title">3. Function arguments</span><span class="chapter-tasks__type">
Task
</span></a></div><div class="chapter-tasks__item"><a class="chapter-tasks__link" href="/courses/php-basics/php-arrays-functions/function-return-value"><span class="chapter-tasks__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/general.svg#chapter_arrow"></use></svg></span><span class="chapter-tasks__title">4. Functions return values</span><span class="chapter-tasks__type">
Task
</span></a></div><div class="chapter-tasks__item"><a class="chapter-tasks__link" href="/courses/php-basics/php-arrays-functions/product-id-function"><span class="chapter-tasks__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/general.svg#chapter_arrow"></use></svg></span><span class="chapter-tasks__title">5. Passing the product ID to the function</span><span class="chapter-tasks__type">
Task
</span></a></div><div class="chapter-tasks__item"><a class="chapter-tasks__link" href="/courses/php-basics/php-arrays-functions/calculate-shipping-cost"><span class="chapter-tasks__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/general.svg#chapter_arrow"></use></svg></span><span class="chapter-tasks__title">6. Calculating the shipping cost</span><span class="chapter-tasks__type">
Task
</span></a></div><div class="chapter-tasks__item"><a class="chapter-tasks__link" href="/courses/php-basics/php-arrays-functions/optimize-function"><span class="chapter-tasks__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/general.svg#chapter_arrow"></use></svg></span><span class="chapter-tasks__title">7. Optimizing the function</span><span class="chapter-tasks__type">
Task
</span></a></div><div class="chapter-tasks__item"><a class="chapter-tasks__link" href="/courses/php-basics/php-arrays-functions/built-in-function"><span class="chapter-tasks__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/general.svg#chapter_arrow"></use></svg></span><span class="chapter-tasks__title">8. Built-in functions</span><span class="chapter-tasks__type">
Task
</span></a></div><div class="chapter-tasks__item"><a class="chapter-tasks__link" href="/courses/php-basics/php-arrays-functions/uasort-function"><span class="chapter-tasks__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/general.svg#chapter_arrow"></use></svg></span><span class="chapter-tasks__title">9. The uasort function and sorting products</span><span class="chapter-tasks__type">
Task
</span></a></div><div class="chapter-tasks__item"><a class="chapter-tasks__link" href="/courses/php-basics/php-arrays-functions/change-sorting-direction"><span class="chapter-tasks__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/general.svg#chapter_arrow"></use></svg></span><span class="chapter-tasks__title">10. Changing the sorting direction</span><span class="chapter-tasks__type">
Task
</span></a></div><div class="chapter-tasks__item"><a class="chapter-tasks__link" href="/courses/php-basics/php-arrays-functions/array-slice-function"><span class="chapter-tasks__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/general.svg#chapter_arrow"></use></svg></span><span class="chapter-tasks__title">11. The array_slice function and retrieving part of an array</span><span class="chapter-tasks__type">
Task
</span></a></div><div class="chapter-tasks__item"><a class="chapter-tasks__link" href="/courses/php-basics/php-arrays-functions/new-products"><span class="chapter-tasks__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/general.svg#chapter_arrow"></use></svg></span><span class="chapter-tasks__title">12. Determining which products are new arrivals</span><span class="chapter-tasks__type">
Task
</span></a></div><div class="chapter-tasks__item"><a class="chapter-tasks__link" href="/courses/php-basics/php-arrays-functions/array-filter-function"><span class="chapter-tasks__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/general.svg#chapter_arrow"></use></svg></span><span class="chapter-tasks__title">13. The array_filter function and filtering the array</span><span class="chapter-tasks__type">
Task
</span></a></div><div class="chapter-tasks__item"><a class="chapter-tasks__link" href="/courses/php-basics/php-arrays-functions/combine-arrays"><span class="chapter-tasks__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/general.svg#chapter_arrow"></use></svg></span><span class="chapter-tasks__title">14. Combining the arrays</span><span class="chapter-tasks__type">
Task
</span></a></div><div class="chapter-tasks__item"><a class="chapter-tasks__link" href="/courses/php-basics/php-arrays-functions/array-rand-function"><span class="chapter-tasks__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/general.svg#chapter_arrow"></use></svg></span><span class="chapter-tasks__title">15. The array_rand function and obtaining random elements</span><span class="chapter-tasks__type">
Task
</span></a></div><div class="chapter-tasks__item"><a class="chapter-tasks__link" href="/courses/php-basics/php-arrays-functions/shuffle-function"><span class="chapter-tasks__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/general.svg#chapter_arrow"></use></svg></span><span class="chapter-tasks__title">16. The shuffle function and shuffling the array</span><span class="chapter-tasks__type">
Task
</span></a></div><div class="chapter-tasks__item"><a class="chapter-tasks__link" href="/courses/php-basics/php-arrays-functions/summary"><span class="chapter-tasks__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/general.svg#chapter_synopsis"></use></svg></span><span class="chapter-tasks__title">17. Summary of “Arrays and functions in PHP”</span><span class="chapter-tasks__type">
Summary
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