Rule `non_printable_character`¶

Remove Zero-width space (ZWSP), Non-breaking space (NBSP) and other invisible unicode symbols.

Warning¶

Risky when strings contain intended invisible characters.

Whether characters should be replaced with escape sequences in strings.

Allowed types: bool

Default value: true

Default configuration.

--- Original
+++ New
-<?php echo "​Hello World !";
+<?php echo "\u{200b}Hello\u{2007}World\u{a0}!";

With configuration: ['use_escape_sequences_in_strings' => false].

--- Original
+++ New
-<?php echo "​Hello World !";
+<?php echo "Hello World !";

The rule is part of the following rule sets:

@PHP70Migration:risky: Using the @PHP70Migration:risky rule set will enable the non_printable_character rule with the default config.
@PHP71Migration:risky: Using the @PHP71Migration:risky rule set will enable the non_printable_character rule with the default config.
@PHP74Migration:risky: Using the @PHP74Migration:risky rule set will enable the non_printable_character rule with the default config.
@PHP80Migration:risky: Using the @PHP80Migration:risky rule set will enable the non_printable_character rule with the default config.
@PhpCsFixer:risky: Using the @PhpCsFixer:risky rule set will enable the non_printable_character rule with the default config.
@Symfony:risky: Using the @Symfony:risky rule set will enable the non_printable_character rule with the default config.