* A class of utilities for dealing with strings.
namespace Automattic\WooCommerce\Utilities;
* A class of utilities for dealing with strings.
* Checks to see whether or not a string starts with another.
* @param string $string The string we want to check.
* @param string $starts_with The string we're looking for at the start of $string.
* @param bool $case_sensitive Indicates whether the comparison should be case-sensitive.
* @return bool True if the $string starts with $starts_with, false otherwise.
public static function starts_with( string $string, string $starts_with, bool $case_sensitive = true ): bool {
$len = strlen( $starts_with );
if ( $len > strlen( $string ) ) {
$string = substr( $string, 0, $len );
return strcmp( $string, $starts_with ) === 0;
return strcasecmp( $string, $starts_with ) === 0;
* Checks to see whether or not a string ends with another.
* @param string $string The string we want to check.
* @param string $ends_with The string we're looking for at the end of $string.
* @param bool $case_sensitive Indicates whether the comparison should be case-sensitive.
* @return bool True if the $string ends with $ends_with, false otherwise.
public static function ends_with( string $string, string $ends_with, bool $case_sensitive = true ): bool {
$len = strlen( $ends_with );
if ( $len > strlen( $string ) ) {
$string = substr( $string, -$len );
return strcmp( $string, $ends_with ) === 0;
return strcasecmp( $string, $ends_with ) === 0;
* Checks if one string is contained into another at any position.
* @param string $string The string we want to check.
* @param string $contained The string we're looking for inside $string.
* @param bool $case_sensitive Indicates whether the comparison should be case-sensitive.
* @return bool True if $contained is contained inside $string, false otherwise.
public static function contains( string $string, string $contained, bool $case_sensitive = true ): bool {
return false !== strpos( $string, $contained );
return false !== stripos( $string, $contained );
* Get the name of a plugin in the form 'directory/file.php', as in the keys of the array returned by 'get_plugins'.
* @param string $plugin_file_path The path of the main plugin file (can be passed as __FILE__ from the plugin itself).
* @return string The name of the plugin in the form 'directory/file.php'.
public static function plugin_name_from_plugin_file( string $plugin_file_path ): string {
return basename( dirname( $plugin_file_path ) ) . DIRECTORY_SEPARATOR . basename( $plugin_file_path );
* Check if a string is null or is empty.
* @param string|null $value The string to check.
* @return bool True if the string is null or is empty.
public static function is_null_or_empty( ?string $value ) {
return is_null( $value ) || '' === $value;
* Check if a string is null, is empty, or has only whitespace characters
* (space, tab, vertical tab, form feed, carriage return, new line)
* @param string|null $value The string to check.
* @return bool True if the string is null, is empty, or contains only whitespace characters.
public static function is_null_or_whitespace( ?string $value ) {
return is_null( $value ) || '' === $value || ctype_space( $value );
* Convert an array of values to a list suitable for a SQL "IN" statement
* (so comma separated and delimited by parenthesis).
* e.g.: [1,2,3] --> (1,2,3)
* @param array $values The values to convert.
* @return string A parenthesized and comma-separated string generated from the values.
* @throws \InvalidArgumentException Empty values array passed.
public static function to_sql_list( array $values ) {
if ( empty( $values ) ) {
// phpcs:ignore WordPress.Security.EscapeOutput.ExceptionNotEscaped
throw new \InvalidArgumentException( self::class_name_without_namespace( __CLASS__ ) . '::' . __FUNCTION__ . ': the values array is empty' );
return '(' . implode( ',', $values ) . ')';
* Get the name of a class without the namespace.
* @param string $class_name The full class name.
* @return string The class name without the namespace.
public static function class_name_without_namespace( string $class_name ) {
// A '?:' would convert this to a one-liner, but WP coding standards disallow these :shrug:.
$result = substr( strrchr( $class_name, '\\' ), 1 );
return $result ? $result : $class_name;
* Normalize the slashes (/ and \) of a local filesystem path by converting them to DIRECTORY_SEPARATOR.
* @param string|null $path Path to normalize.
* @return string|null Normalized path, or null if the input was null.
public static function normalize_local_path_slashes( ?string $path ) {
return is_null( $path ) ? null : str_replace( array( '\\', '/' ), DIRECTORY_SEPARATOR, $path );
It is recommended that you Edit text format, this type of Fix handles quite a lot in one request
