html_build_attributes

PHP 5 >= 5.4, PHP 7, PHP 8

Generate a string of HTML attributes.

Installation

Using Composer:

$ composer require mcaskill/php-html-build-attributes

Alternatively, download Function.HTML-Build-Attributes.php from the package source and save the file into your project path somewhere.

Upgrading

This package follows semantic versioning, which means breaking changes may occur between major releases.

API

html_build_attributes( array|object $attr [, callable $callback = null ] ) : string

Parameters

• attr — Associative array or object containing properties, representing attribute names and values.

  If attr is a non-iterable object, then only accessible non-static properties will be incorporated into the result.

  If an attribute name is an empty string, the attribute is ignored. The attribute name will be trimmed of leading/trailing whitespace.

  If an attribute value is callable (either as a Closure or invokable), it is called and the returned value continues processing.

  If an attribute value is null, the attribute is ignored.

  If an attribute value is an arrayable or a stringable object, it is converted to its primitive type.

  If an attribute value is a boolean and true, the attribute will be rendered without a value, otherwise the attribute is ignored.

  If an attribute value is an array, only numbers and strings are accepted. Strings of the array will be trimmed of leading/trailing whitespace. If the filtered array is empty, the attribute is ignored.

  Any other value will be serialized using json_encode().

• callback — Callback function to escape the values for HTML attributes.

  If no function is provided, htmlspecialchars() is used;

  If using WordPress, the esc_attr() function is used.

Return Values

Returns a string of HTML attributes or a empty string if attr is invalid or empty.

Examples

Example #1: Simple usage of html_build_attributes()

$attr = [
  'type'           => 'file',
  'id'             => 'avatar',
  'name'           => 'avatar',
  'class'          => [ 'form-control', 'form-control-sm' ],
  'multiple'       => true,
  'disabled'       => false,
  'accept'         => implode(',', [ 'image/png', 'image/jpeg' ]),
  'data-max-files' => 3,
];

echo '<input ' . html_build_attributes($attr) . '>';

The above example will output:

<input type="file" id="avatar" name="avatar" class="form-control form-control-sm" multiple accept="image/png,image/jpeg" data-max-files="3">