1.根据类型获取当前时间
function current_time( $type, $gmt = 0 ) {
switch ( $type ) {
case 'mysql':
return ( $gmt ) ? gmdate( 'Y-m-d H:i:s' ) : gmdate( 'Y-m-d H:i:s', ( time() + ( get_option( 'gmt_offset' ) * HOUR_IN_SECONDS ) ) );
case 'timestamp':
return ( $gmt ) ? time() : time() + ( get_option( 'gmt_offset' ) * HOUR_IN_SECONDS );
default:
return ( $gmt ) ? date( $type ) : date( $type, time() + ( get_option( 'gmt_offset' ) * HOUR_IN_SECONDS ) );
}
}
2.转换字节到对应单位
function size_format( $bytes, $decimals = 0 ) {
$quant = array(
// ========================= Origin ====
'TB' => 1099511627776, // pow( 1024, 4)
'GB' => 1073741824, // pow( 1024, 3)
'MB' => 1048576, // pow( 1024, 2)
'kB' => 1024, // pow( 1024, 1)
'B ' => 1, // pow( 1024, 0)
);
foreach ( $quant as $unit => $mag )
if ( doubleval($bytes) >= $mag )
return number_format_i18n( $bytes / $mag, $decimals ) . ' ' . $unit;
return false;
}
function number_format_i18n( $number, $decimals = 0 ) {
global $wp_locale;
$formatted = number_format( $number, absint( $decimals ), $wp_locale->number_format['decimal_point'], $wp_locale->number_format['thousands_sep'] );
/**
* Filter the number formatted based on the locale.
*
* @since 2.8.0
*
* @param string $formatted Converted number in string format.
*/
return apply_filters( 'number_format_i18n', $formatted );
}
3.转义引号
function add_magic_quotes( $array ) {
foreach ( (array) $array as $k => $v ) {
if ( is_array( $v ) ) {
$array[$k] = add_magic_quotes( $v );
} else {
$array[$k] = addslashes( $v );
}
}
return $array;
}
4.缓存javascript
function cache_javascript_headers() {
$expiresOffset = 10 * DAY_IN_SECONDS;
header( "Content-Type: text/javascript; charset=" . get_bloginfo( 'charset' ) );
header( "Vary: Accept-Encoding" ); // Handle proxies
header( "Expires: " . gmdate( "D, d M Y H:i:s", time() + $expiresOffset ) . " GMT" );
}
5.创建绝对路径的目录
/**
* Recursive directory creation based on full path.
*
* Will attempt to set permissions on folders.
*
* @since 2.0.1
*
* @param string $target Full path to attempt to create.
* @return bool Whether the path was created. True if path already exists.
*/
function wp_mkdir_p( $target ) {
$wrapper = null; // Strip the protocol.
if( wp_is_stream( $target ) ) {
list( $wrapper, $target ) = explode( '://', $target, 2 );
} // From php.net/mkdir user contributed notes.
$target = str_replace( '//', '/', $target ); // Put the wrapper back on the target.
if( $wrapper !== null ) {
$target = $wrapper . '://' . $target;
} /*
* Safe mode fails with a trailing slash under certain PHP versions.
* Use rtrim() instead of untrailingslashit to avoid formatting.php dependency.
*/
$target = rtrim($target, '/');
if ( empty($target) )
$target = '/'; if ( file_exists( $target ) )
return @is_dir( $target ); // We need to find the permissions of the parent folder that exists and inherit that.
$target_parent = dirname( $target );
while ( '.' != $target_parent && ! is_dir( $target_parent ) ) {
$target_parent = dirname( $target_parent );
} // Get the permission bits.
if ( $stat = @stat( $target_parent ) ) {
$dir_perms = $stat['mode'] & 0007777;
} else {
$dir_perms = 0777;
} if ( @mkdir( $target, $dir_perms, true ) ) { /*
* If a umask is set that modifies $dir_perms, we'll have to re-set
* the $dir_perms correctly with chmod()
*/
if ( $dir_perms != ( $dir_perms & ~umask() ) ) {
$folder_parts = explode( '/', substr( $target, strlen( $target_parent ) + 1 ) );
for ( $i = 1; $i <= count( $folder_parts ); $i++ ) {
@chmod( $target_parent . '/' . implode( '/', array_slice( $folder_parts, 0, $i ) ), $dir_perms );
}
} return true;
} return false;
}
6.创建唯一的文件名
/**
* Get a filename that is sanitized and unique for the given directory.
*
* If the filename is not unique, then a number will be added to the filename
* before the extension, and will continue adding numbers until the filename is
* unique.
*
* The callback is passed three parameters, the first one is the directory, the
* second is the filename, and the third is the extension.
*
* @since 2.5.0
*
* @param string $dir Directory.
* @param string $filename File name.
* @param callback $unique_filename_callback Callback. Default null.
* @return string New filename, if given wasn't unique.
*/
function wp_unique_filename( $dir, $filename, $unique_filename_callback = null ) {
// Sanitize the file name before we begin processing.
//$filename = sanitize_file_name($filename); // Separate the filename into a name and extension.
$info = pathinfo($filename);
$ext = !empty($info['extension']) ? '.' . $info['extension'] : '';
$name = basename($filename, $ext); // Edge case: if file is named '.ext', treat as an empty name.
if ( $name === $ext )
$name = ''; /*
* Increment the file number until we have a unique file to save in $dir.
* Use callback if supplied.
*/
if ( $unique_filename_callback && is_callable( $unique_filename_callback ) ) {
$filename = call_user_func( $unique_filename_callback, $dir, $name, $ext );
} else {
$number = ''; // Change '.ext' to lower case.
if ( $ext && strtolower($ext) != $ext ) {
$ext2 = strtolower($ext);
$filename2 = preg_replace( '|' . preg_quote($ext) . '$|', $ext2, $filename ); // Check for both lower and upper case extension or image sub-sizes may be overwritten.
while ( file_exists($dir . "/$filename") || file_exists($dir . "/$filename2") ) {
$new_number = $number + 1;
$filename = str_replace( "$number$ext", "$new_number$ext", $filename );
$filename2 = str_replace( "$number$ext2", "$new_number$ext2", $filename2 );
$number = $new_number;
}
return $filename2;
} while ( file_exists( $dir . "/$filename" ) ) {
if ( '' == "$number$ext" )
$filename = $filename . ++$number . $ext;
else
$filename = str_replace( "$number$ext", ++$number . $ext, $filename );
}
} return $filename;
}
读到L2035==>待续