wpisl-options.php

<?php
/**
 * WP Image Size Limit - Options
 *
 * @since Version 1.0
 */


/**
 * Register the form setting for our wpisl_options array.
 *
 * This function is attached to the admin_init action hook.
 *
 * @since Version 1.0
 */
function wpisl_options_init() {

	// If we have no options in the database, let's add them now.
	if ( false === wpisl_get_options() )
		add_option( 'wpisl_options', wpisl_get_default_options() );

	register_setting(
		'media',       // Options group
		'wpisl_options', // Database option, see wpisl_get_options()
		'wpisl_options_validate' // The sanitization callback, see wpisl_options_validate()
	);

	add_settings_field(
		'img_upload_limit',
		'Maximum File Size for Images',
		'wpisl_settings_field_img_upload_limit',
		'media',
		'uploads'
	);

	add_settings_field(
		'img_upload_limit_types_regex',
		'MIME types regex pattern of media files where the upload limit is enforced',
		'wpisl_settings_field_img_upload_limit_types_regex',
		'media',
		'uploads'
	);
}
add_action( 'admin_init', 'wpisl_options_init' );


/**
 * Returns the default options.
 *
 * @since Version 1.0
 */
function wpisl_get_default_options() {
	$wpisl = new WP_Image_Size_Limit;
	$limit = $wpisl->wp_limit();
	$default_options = array(
		'img_upload_limit' => $limit,
		'img_upload_limit_types_regex' => '/^image\//',
	);

	return apply_filters( 'wpisl_default_options', $default_options );
}

/**
 * Returns the options array.
 *
 * @since Version 1.0
 */
function wpisl_get_options() {
	return get_option( 'wpisl_options', wpisl_get_default_options() );
}


/**
 * Renders the Maximum Upload Size setting field.
 *
 * @since Version 1.0
 *
 */

function wpisl_settings_field_img_upload_limit() {
	$options = wpisl_get_options();
	$wpisl = new WP_Image_Size_Limit;
	$limit = $wpisl->wp_limit();

		// Sanitize
		$id = 'img_upload_limit';

		if ( isset($options[$id]) && ($options[$id] < $limit) ) {
			$value = $options[$id];
		}
		/*elseif  ( empty($options[$id])  )  {
			$value = '1000';
		} */
		else {
			$value = $limit;
		}

		$field = '<p>
			<input name="wpisl_options[' . $id . ']' . '" id="wpisl-limit" type="text" value="' . $value . '" size="4" maxlength="5" /> KB
			<br>
			<span class="description">Server maximum: '.$limit.' KB</span>
		</p>';

	echo $field;

}

function wpisl_settings_field_img_upload_limit_types_regex() {
	$options = wpisl_get_options();
	$id = 'img_upload_limit_types_regex';

	if ( isset($options[$id]) ) {
		$value = $options[$id];
	}
	else {
		$value = '/^image\//';
	}

	$field = '<p>
		<input name="wpisl_options[' . $id . ']' . '" id="wpisl-limit-type" type="text" value="' . $value . '" size="80" />
		<br/>
		<a href="http://php.net/manual/en/reference.pcre.pattern.syntax.php">Regex Pattern Reference</a>
		<br/><span class="hint">Use <code>/^image\//</code> to match all image types</span>
	</p>';

	echo $field;

}

/**
 * Sanitize and validate form input. Accepts an array, return a sanitized array.
 *
 * @see wpisl_options_init()
 * @since Version 1.0
 */
function wpisl_options_validate( $input ) {
	$output = $defaults = wpisl_get_default_options();
	$wpisl = new WP_Image_Size_Limit;
	$limit = $wpisl->wp_limit();

	$output['img_upload_limit'] = str_replace(',','', $input['img_upload_limit']);

	$output['img_upload_limit'] = absint( intval( $output['img_upload_limit'] ) );

	if ( $output['img_upload_limit'] > $limit ) {
		$output['img_upload_limit'] = $limit;
	}

	// TODO: verify regex, maybe?
	$output['img_upload_limit_types_regex'] = $input['img_upload_limit_types_regex'];

	return apply_filters( 'wpisl_options_validate', $output, $input, $defaults );
}

function unique_identifyer_admin_notices() {
     settings_errors( 'img_upload_limit' );
}
add_action( 'admin_notices', 'unique_identifyer_admin_notices' );