WP_Filesystem_Base::is_binary( string $text )

Determines if the string provided contains binary characters.

Parameters

$text

(string) (Required) String to test against.

Return

(bool) True if string is binary, false otherwise.

Source

File: wp-admin/includes/class-wp-filesystem-base.php 

public function is_binary( $text ) {
		return (bool) preg_match( '|[^\x20-\x7E]|', $text ); // chr(32)..chr(127)
	}

Changelog

Version Description
2.7.0 Introduced.

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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/classes/wp_filesystem_base/is_binary