118 lines
2.5 KiB
PHP
118 lines
2.5 KiB
PHP
<?php
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namespace W3TC;
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class Util_Mime {
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/**
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* Returns file mime type
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*
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* @param string $file
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* @return string
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*/
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static public function get_mime_type( $file ) {
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static $cache = array();
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if ( !isset( $cache[$file] ) ) {
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$mime_type = false;
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/**
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* Try to detect by extension (fast)
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*/
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$mime_types = include W3TC_INC_DIR . '/mime/all.php';
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foreach ( $mime_types as $extension => $type ) {
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if ( preg_match( '~\.(' . $extension . ')$~i', $file ) ) {
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if ( is_array( $type ) )
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$mime_type = array_pop( $type );
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else
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$mime_type = $type;
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break;
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}
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}
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/**
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* Try to detect using file info function
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*/
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if ( !$mime_type && function_exists( 'finfo_open' ) ) {
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$finfo = @finfo_open( FILEINFO_MIME );
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if ( !$finfo ) {
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$finfo = @finfo_open( FILEINFO_MIME );
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}
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if ( $finfo ) {
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$mime_type = @finfo_file( $finfo, $file );
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if ( $mime_type ) {
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$extra_mime_type_info = strpos( $mime_type, "; " );
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if ( $extra_mime_type_info ) {
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$mime_type = substr( $mime_type, 0, $extra_mime_type_info );
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}
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if ( $mime_type == 'application/octet-stream' ) {
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$mime_type = false;
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}
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}
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@finfo_close( $finfo );
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}
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}
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/**
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* Try to detect using mime type function
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*/
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if ( !$mime_type && function_exists( 'mime_content_type' ) ) {
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$mime_type = @mime_content_type( $file );
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}
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/**
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* If detection failed use default mime type
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*/
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if ( !$mime_type ) {
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$mime_type = 'application/octet-stream';
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}
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$cache[$file] = $mime_type;
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}
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return $cache[$file];
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}
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static public function sections_to_mime_types_map() {
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static $sections_to_mime_types_array = null;
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if ( is_null( $sections_to_mime_types_array ) ) {
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$sections_to_mime_types_array = array(
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'cssjs' => include W3TC_INC_DIR . '/mime/cssjs.php',
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'html' => include W3TC_INC_DIR . '/mime/html.php',
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'other' => include W3TC_INC_DIR . '/mime/other.php'
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);
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}
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return $sections_to_mime_types_array;
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}
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static public function mime_type_to_section( $mime_type ) {
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static $mime_type_to_section_array = null;
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if ( is_null( $mime_type_to_section_array ) ) {
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$sections = self::sections_to_mime_types_map();
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$mime_type_to_section_array = array();
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foreach ( $sections as $section => $mime_types ) {
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foreach ( $mime_types as $mime_type ) {
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$mime_type_to_section_array[$mime_type] = $section;
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}
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}
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}
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return isset( $mime_type_to_section_array[$mime_type] ) ?
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$mime_type_to_section_array[$mime_type] : null;
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}
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}
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