img_caption_shortcode()
最后更新于:2021-11-27 06:47:14
img_caption_shortcode( array$attr, string$content=null)Builds the Caption shortcode output.
参数
- $attr
-
(array) (Required) Attributes of the caption shortcode.
-
‘id’
(string) ID of the image and caption container element, i.e.<figure>
or<div>
. -
‘caption_id’
(string) ID of the caption element, i.e.<figcaption>
or<p>
. -
‘align’
(string) Class name that aligns the caption. Default ‘alignnone’. Accepts ‘alignleft’, ‘aligncenter’, alignright’, ‘alignnone’. -
‘width’
(int) The width of the caption, in pixels. -
‘caption’
(string) The caption text. -
‘class’
(string) Additional class name(s) added to the caption container.
-
‘id’
- $content
-
(string) (Optional) Shortcode content.
Default value: null
响应
(string) HTML content to display the caption.
源文件
文件: gc-includes/media.php
function img_caption_shortcode( $attr, $content = null ) {
// New-style shortcode with the caption inside the shortcode with the link and image tags.
if ( ! isset( $attr['caption'] ) ) {
if ( preg_match( '#((?:<a [^>]+>s*)?<img [^>]+>(?:s*</a>)?)(.*)#is', $content, $matches ) ) {
$content = $matches[1];
$attr['caption'] = trim( $matches[2] );
}
} elseif ( strpos( $attr['caption'], '<' ) !== false ) {
$attr['caption'] = gc_kses( $attr['caption'], 'post' );
}
/**
* Filters the default caption shortcode output.
*
* If the filtered output isn't empty, it will be used instead of generating
* the default caption template.
*
* @since 2.6.0
*
* @see img_caption_shortcode()
*
* @param string $output The caption output. Default empty.
* @param array $attr Attributes of the caption shortcode.
* @param string $content The image element, possibly wrapped in a hyperlink.
*/
$output = apply_filters( 'img_caption_shortcode', '', $attr, $content );
if ( ! empty( $output ) ) {
return $output;
}
$atts = shortcode_atts(
array(
'id' => '',
'caption_id' => '',
'align' => 'alignnone',
'width' => '',
'caption' => '',
'class' => '',
),
$attr,
'caption'
);
$atts['width'] = (int) $atts['width'];
if ( $atts['width'] < 1 || empty( $atts['caption'] ) ) {
return $content;
}
$id = '';
$caption_id = '';
$describedby = '';
if ( $atts['id'] ) {
$atts['id'] = sanitize_html_class( $atts['id'] );
$id = 'id="' . esc_attr( $atts['id'] ) . '" ';
}
if ( $atts['caption_id'] ) {
$atts['caption_id'] = sanitize_html_class( $atts['caption_id'] );
} elseif ( $atts['id'] ) {
$atts['caption_id'] = 'caption-' . str_replace( '_', '-', $atts['id'] );
}
if ( $atts['caption_id'] ) {
$caption_id = 'id="' . esc_attr( $atts['caption_id'] ) . '" ';
$describedby = 'aria-describedby="' . esc_attr( $atts['caption_id'] ) . '" ';
}
$class = trim( 'gc-caption ' . $atts['align'] . ' ' . $atts['class'] );
$html5 = current_theme_supports( 'html5', 'caption' );
// HTML5 captions never added the extra 10px to the image width.
$width = $html5 ? $atts['width'] : ( 10 + $atts['width'] );
/**
* Filters the width of an image's caption.
*
* By default, the caption is 10 pixels greater than the width of the image,
* to prevent post content from running up against a floated image.
*
* @since 3.7.0
*
* @see img_caption_shortcode()
*
* @param int $width Width of the caption in pixels. To remove this inline style,
* return zero.
* @param array $atts Attributes of the caption shortcode.
* @param string $content The image element, possibly wrapped in a hyperlink.
*/
$caption_width = apply_filters( 'img_caption_shortcode_width', $width, $atts, $content );
$style = '';
if ( $caption_width ) {
$style = 'style="width: ' . (int) $caption_width . 'px" ';
}
if ( $html5 ) {
$html = sprintf(
'<figure %s%s%sclass="%s">%s%s</figure>',
$id,
$describedby,
$style,
esc_attr( $class ),
do_shortcode( $content ),
sprintf(
'<figcaption %sclass="gc-caption-text">%s</figcaption>',
$caption_id,
$atts['caption']
)
);
} else {
$html = sprintf(
'<div %s%sclass="%s">%s%s</div>',
$id,
$style,
esc_attr( $class ),
str_replace( '<img ', '<img ' . $describedby, do_shortcode( $content ) ),
sprintf(
'<p %sclass="gc-caption-text">%s</p>',
$caption_id,
$atts['caption']
)
);
}
return $html;
}