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

`use_escape_sequences_in_strings`

Whether characters should be replaced with escape sequences in strings.

Allowed types: bool

Default value: false

Examples

Example #1

Default configuration.

--- Original
+++ New
@@ -1 +1 @@
-<?php echo "Hello World !";
+<?php echo "Hello World !";

Example #2

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

--- Original
+++ New
@@ -1 +1 @@
-<?php echo "Hello World !";
+<?php echo "\u{200b}Hello\u{2007}World\u{a0}!";

Rule sets

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 config below:

['use_escape_sequences_in_strings' => true]

@PHP71Migration:risky

Using the @PHP71Migration:risky rule set will enable the non_printable_character rule with the config below:

['use_escape_sequences_in_strings' => true]

@PHP74Migration:risky

Using the @PHP74Migration:risky rule set will enable the non_printable_character rule with the config below:

['use_escape_sequences_in_strings' => true]

@PHP80Migration:risky

Using the @PHP80Migration:risky rule set will enable the non_printable_character rule with the config below:

['use_escape_sequences_in_strings' => true]

@PhpCsFixer:risky

Using the @PhpCsFixer:risky rule set will enable the non_printable_character rule with the config below:

['use_escape_sequences_in_strings' => true]

@Symfony:risky

Using the @Symfony:risky rule set will enable the non_printable_character rule with the config below:

['use_escape_sequences_in_strings' => true]