Rule `non_printable_character`¶

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

Warning

Using this rule is risky.

Risky when strings contain intended invisible characters.

Configuration¶

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.