PHP :: Request #68777 :: \a escape not supported for double-quoted strings and heredocs

\a escape not supported for double-quoted strings and heredocs

Submitted:

2015-01-09 10:27 UTC

Modified:

2021-09-09 12:43 UTC

Votes:	2
Avg. Score:	3.0 ± 2.0
Reproduced:	2 of 2 (100.0%)
Same Version:	1 (50.0%)
Same OS:	1 (50.0%)

From:

ajf at ajf dot me

Assigned:

Status:

Open

Package:

Strings related

PHP Version:

Irrelevant

OS:

Private report:

CVE-ID:

None

[2015-01-09 10:27 UTC] ajf at ajf dot me

Description:
------------
Despite the support for the completely useless \v (vertical tab), \a, which produces the familiar terminal beep or flash that we all know and love, is conspicuously absent from PHP.

Test script:
---------------
<?php
echo "\a";

Expected result:
----------------
<terminal beeps/flashes/some other "alert" if supported>

Actual result:
--------------
\a

Patches

Pull Requests

History

[2015-01-09 11:50 UTC] anon at anon dot anon

Adding that would break backwards compatibility, so they will probably not do it without overwhelming reason to, but you can always use "\7" instead.

[2015-01-09 18:16 UTC] ajf at ajf dot me

It would, but we have previously added \e, \v, \f, the first one in 5.4. I think it's an acceptable break for a minor or major.

[2021-09-09 12:43 UTC] cmb@php.net

-Type: Bug +Type: Feature/Change Request

[2021-09-09 12:43 UTC] cmb@php.net

That doesn't look like a bug to me, but rather a feature request.

[2021-10-15 18:17 UTC] anthon dot pang at gmail dot com

The "\b" (backspace) isn't supported in double-quoted strings either. (That said, the sequence is supported in json_decode() per the spec, https://www.json.org/json-en.html).

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