wp_read_image_metadata [ WordPress Function ]
wp_read_image_metadata ( $file )
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| Returns: |
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| Defined at: |
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Benzer Fonksiyonlar: update_metadata, wp_ajax_image_editor, add_metadata, wp_stream_image, wp_image_editor
Get extended image metadata, exif or iptc as available.
Retrieves the EXIF metadata aperture, credit, camera, caption, copyright, iso created_timestamp, focal_length, shutter_speed, and title.
The IPTC metadata that is retrieved is APP13, credit, byline, created date and time, caption, copyright, and title. Also includes FNumber, Model, DateTimeDigitized, FocalLength, ISOSpeedRatings, and ExposureTime.
Source
<?php
function wp_read_image_metadata( $file ) {
if ( ! file_exists( $file ) )
return false;
list( , , $sourceImageType ) = getimagesize( $file );
// exif contains a bunch of data we'll probably never need formatted in ways
// that are difficult to use. We'll normalize it and just extract the fields
// that are likely to be useful. Fractions and numbers are converted to
// floats, dates to unix timestamps, and everything else to strings.
$meta = array(
'aperture' => 0,
'credit' => '',
'camera' => '',
'caption' => '',
'created_timestamp' => 0,
'copyright' => '',
'focal_length' => 0,
'iso' => 0,
'shutter_speed' => 0,
'title' => '',
);
// read iptc first, since it might contain data not available in exif such
// as caption, description etc
if ( is_callable( 'iptcparse' ) ) {
getimagesize( $file, $info );
if ( ! empty( $info['APP13'] ) ) {
$iptc = iptcparse( $info['APP13'] );
// headline, "A brief synopsis of the caption."
if ( ! empty( $iptc['2#105'][0] ) )
$meta['title'] = utf8_encode( trim( $iptc['2#105'][0] ) );
// title, "Many use the Title field to store the filename of the image, though the field may be used in many ways."
elseif ( ! empty( $iptc['2#005'][0] ) )
$meta['title'] = utf8_encode( trim( $iptc['2#005'][0] ) );
if ( ! empty( $iptc['2#120'][0] ) ) { // description / legacy caption
$caption = utf8_encode( trim( $iptc['2#120'][0] ) );
if ( empty( $meta['title'] ) ) {
// Assume the title is stored in 2:120 if it's short.
if ( strlen( $caption ) < 80 )
$meta['title'] = $caption;
else
$meta['caption'] = $caption;
} elseif ( $caption != $meta['title'] ) {
$meta['caption'] = $caption;
}
}
if ( ! empty( $iptc['2#110'][0] ) ) // credit
$meta['credit'] = utf8_encode(trim($iptc['2#110'][0]));
elseif ( ! empty( $iptc['2#080'][0] ) ) // creator / legacy byline
$meta['credit'] = utf8_encode(trim($iptc['2#080'][0]));
if ( ! empty( $iptc['2#055'][0] ) and ! empty( $iptc['2#060'][0] ) ) // created date and time
$meta['created_timestamp'] = strtotime( $iptc['2#055'][0] . ' ' . $iptc['2#060'][0] );
if ( ! empty( $iptc['2#116'][0] ) ) // copyright
$meta['copyright'] = utf8_encode( trim( $iptc['2#116'][0] ) );
}
}
// fetch additional info from exif if available
if ( is_callable( 'exif_read_data' ) && in_array( $sourceImageType, apply_filters( 'wp_read_image_metadata_types', array( IMAGETYPE_JPEG, IMAGETYPE_TIFF_II, IMAGETYPE_TIFF_MM ) ) ) ) {
$exif = @exif_read_data( $file );
if ( !empty( $exif['Title'] ) )
$meta['title'] = utf8_encode( trim( $exif['Title'] ) );
if ( ! empty( $exif['ImageDescription'] ) ) {
if ( empty( $meta['title'] ) && strlen( $exif['ImageDescription'] ) < 80 ) {
// Assume the title is stored in ImageDescription
$meta['title'] = utf8_encode( trim( $exif['ImageDescription'] ) );
if ( ! empty( $exif['COMPUTED']['UserComment'] ) && trim( $exif['COMPUTED']['UserComment'] ) != $meta['title'] )
$meta['caption'] = utf8_encode( trim( $exif['COMPUTED']['UserComment'] ) );
} elseif ( trim( $exif['ImageDescription'] ) != $meta['title'] ) {
$meta['caption'] = utf8_encode( trim( $exif['ImageDescription'] ) );
}
} elseif ( ! empty( $exif['Comments'] ) && trim( $exif['Comments'] ) != $meta['title'] ) {
$meta['caption'] = utf8_encode( trim( $exif['Comments'] ) );
}
if ( ! empty( $exif['Artist'] ) )
$meta['credit'] = utf8_encode( trim( $exif['Artist'] ) );
elseif ( ! empty($exif['Author'] ) )
$meta['credit'] = utf8_encode( trim( $exif['Author'] ) );
if ( ! empty( $exif['Copyright'] ) )
$meta['copyright'] = utf8_encode( trim( $exif['Copyright'] ) );
if ( ! empty($exif['FNumber'] ) )
$meta['aperture'] = round( wp_exif_frac2dec( $exif['FNumber'] ), 2 );
if ( ! empty($exif['Model'] ) )
$meta['camera'] = utf8_encode( trim( $exif['Model'] ) );
if ( ! empty($exif['DateTimeDigitized'] ) )
$meta['created_timestamp'] = wp_exif_date2ts($exif['DateTimeDigitized'] );
if ( ! empty($exif['FocalLength'] ) )
$meta['focal_length'] = wp_exif_frac2dec( $exif['FocalLength'] );
if ( ! empty($exif['ISOSpeedRatings'] ) )
$meta['iso'] = utf8_encode( trim( $exif['ISOSpeedRatings'] ) );
if ( ! empty($exif['ExposureTime'] ) )
$meta['shutter_speed'] = wp_exif_frac2dec( $exif['ExposureTime'] );
}
return apply_filters( 'wp_read_image_metadata', $meta, $file, $sourceImageType );
}
?>
Examples [ wp-snippets.com ]
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