Create str_contains PHP function #5179

philippta · 2020-02-13T15:24:08Z

There is currently no function to check if a string contains another string. The only way to achive this behavior is to use other functions like strpos or strstr.

This type of function exists for example for arrays (in_array), while there is still array_search (equivalent to strpos) available.

I would like to propose the new function str_contains:

str_contains ( string $haystack , string $needle ) : bool

It takes a $haystack and $needle as a parameter and checks if the $haystack string contains the $needle string. It returns a boolean value (true/false) to indicate weather the $needle is found.

Example:

<?php

str_contains("abc", "a"); // true
str_contains("abc", "d"); // false

nikic

I'm in favor, but this will need an RFC (https://wiki.php.net/rfc/howto).

ext/standard/basic_functions_arginfo.h

philippta · 2020-02-14T08:35:11Z

I'm in favor, but this will need an RFC (https://wiki.php.net/rfc/howto).

This sounds great. I will go ahead and create an RFC for this.

jrbasso · 2020-02-16T02:52:51Z

To avoid another PR/RFC, what do you think in including a str_icontains function too? Many of other str functions has the i version.

Girgias · 2020-02-16T12:35:03Z

To avoid another PR/RFC, what do you think in including a str_icontains function too? Many of other str functions has the i version.

See https://externals.io/message/108562 as to why it doesn't make a lot of sense to include a case insensitive version.

philippta · 2020-02-17T11:39:34Z

An RFC has been created: https://wiki.php.net/rfc/str_contains

laruence · 2020-02-21T05:12:52Z

I am not sure what is the difference between this and if (strpos === false).

KennedyTedesco · 2020-02-21T13:35:30Z

To me, as a user, it is purely about UX. Having a str_contains it's better than using strpos.

lcobucci · 2020-03-03T08:10:09Z

Could you please add a test covering the examples you have in the RFC? That would be quite good to ensure that things behave properly throughout time 👍

philippta · 2020-03-13T09:01:44Z

Could you please add a test covering the examples you have in the RFC? That would be quite good to ensure that things behave properly throughout time

Tests have been added.

Gemorroj · 2020-03-14T19:31:43Z

what about multibyte support?

// UTF-8
str_contains("тест", "т"); // ???

Girgias · 2020-03-14T19:33:29Z

what about multibyte support?
// UTF-8
str_contains("тест", "т"); // ???

That would return true

Gemorroj · 2020-03-14T19:44:45Z

@Girgias maybe add third option for case-insensitive cases? str_contains("abc", "A");

str_contains ( string $haystack , string $needle, bool $caseInsensitive = false ) : bool

or make new function str_icontains for case-insensitive cases

Girgias · 2020-03-14T19:51:43Z

@Girgias maybe add third option for case-insensitive cases? str_contains("abc", "A");
str_contains ( string $haystack , string $needle, bool $caseInsensitive = false ) : bool
or make new function str_icontains for case-insensitive cases

... Have you read this PR thread and or the RFC? I've linked reasons as to why it doesn't make sense: #5179 (comment)
The RFC also says why it is not in the proposal: #5179 (comment)

Girgias · 2020-03-14T19:51:44Z

@Girgias maybe add third option for case-insensitive cases? str_contains("abc", "A");
str_contains ( string $haystack , string $needle, bool $caseInsensitive = false ) : bool
or make new function str_icontains for case-insensitive cases

... Have you read this PR thread and or the RFC? I've linked reasons as to why it doesn't make sense: #5179 (comment)
The RFC also says why it is not in the proposal: #5179 (comment)

Gemorroj · 2020-03-14T20:02:30Z

Have you read this PR thread and or the RFC?

No. But now yes. There are answers to all my questions. Thanks.
It would be good to specify a link to the RFC in the first post, so that there are no such misunderstandings.

philippta · 2020-03-16T09:46:14Z

The RFC has been accepted and the voting phase has been closed.
It is now ready to be merged.

scottchiefbaker · 2020-05-30T21:52:43Z

Are there official polyfills for the new this and the other new string functions?

Gemorroj · 2020-05-30T21:55:32Z

@scottchiefbaker https://github.com/symfony/polyfill-php80

scottchiefbaker · 2020-05-30T21:58:39Z

@Gemorroj perfect, thank you

leernd007 · 2020-06-03T16:50:37Z

I am not sure what is the difference between this and if (strpos === false).

Repurposing strpos and strstr for this use-case has a few down sides. Either, they are:

not very intuitive for a reader
easy to get wrong (especially with the !== comparison)
or hard to remember for new PHP developers.

https://wiki.php.net/rfc/str_contains

sfaut · 2020-07-13T23:12:17Z

I am not sure what is the difference between this and if (strpos === false).

Empty string management differs. strpos('foo', '') emits a warning and returns false.

When I search something I don't want always to have true returned in some cases. I think it is bug-compliant.

* RemoveUnusedVariableInCatchRector (https://wiki.php.net/rfc/non-capturing_catches) * ClassPropertyAssignToConstructorPromotionRector (https://wiki.php.net/rfc/constructor_promotion php/php-src#5291) * StrContainsRector (https://externals.io/message/108562 php/php-src#5179)

dani7115 · 2022-05-07T08:42:40Z

I always wanted this, Since the day i started programming in PHP :) . Thanks Finally

Applied rules: * TokenGetAllToObjectRector (https://wiki.php.net/rfc/token_as_object) * StrEndsWithRector (https://wiki.php.net/rfc/add_str_starts_with_and_ends_with_functions) * StrStartsWithRector (https://wiki.php.net/rfc/add_str_starts_with_and_ends_with_functions) * StrContainsRector (https://externals.io/message/108562 php/php-src#5179)

Applied rules: * StrEndsWithRector (https://wiki.php.net/rfc/add_str_starts_with_and_ends_with_functions) * StrStartsWithRector (https://wiki.php.net/rfc/add_str_starts_with_and_ends_with_functions) * StrContainsRector (https://externals.io/message/108562 php/php-src#5179)

Applied rules: * ClassPropertyAssignToConstructorPromotionRector (https://wiki.php.net/rfc/constructor_promotion php/php-src#5291) * StrStartsWithRector (https://wiki.php.net/rfc/add_str_starts_with_and_ends_with_functions) * StrContainsRector (https://externals.io/message/108562 php/php-src#5179) * ReadOnlyPropertyRector (https://wiki.php.net/rfc/readonly_properties_v2)

Applied rules: * LongArrayToShortArrayRector * TernaryToNullCoalescingRector * PublicConstantVisibilityRector (https://wiki.php.net/rfc/class_const_visibility) * ListToArrayDestructRector (https://wiki.php.net/rfc/short_list_syntax https://www.php.net/manual/en/migration71.new-features.php#migration71.new-features.symmetric-array-destructuring) * MixedTypeRector * StrContainsRector (https://externals.io/message/108562 php/php-src#5179) * ChangeSwitchToMatchRector (https://wiki.php.net/rfc/match_expression_v2) * FinalizePublicClassConstantRector (https://php.watch/versions/8.1/final-class-const) * NullToStrictStringFuncCallArgRector * TypedPropertyFromAssignsRector

nikic added the RFC label Feb 13, 2020

nikic reviewed Feb 13, 2020

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ext/standard/basic_functions_arginfo.h Show resolved Hide resolved

philippta force-pushed the str_contains branch from 163c576 to 0de0e3d Compare February 14, 2020 08:12

Create str_contains php function

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philippta force-pushed the str_contains branch from 0de0e3d to 5994551 Compare February 14, 2020 08:32

Add tests for str_contains() function

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philippta force-pushed the str_contains branch from 7711fad to 3ed6214 Compare March 13, 2020 09:02

Merge branch 'master' into str_contains

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philippta force-pushed the str_contains branch from 3ed6214 to c31f57d Compare March 13, 2020 09:03

nikic approved these changes Mar 16, 2020

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php-pulls closed this in 1668ad7 Mar 16, 2020

carusogabriel added this to the PHP 8.0 milestone May 29, 2020

franzholz mentioned this pull request Jan 15, 2022

PHP 8 rector recommended changes FriendsOfTYPO3/typo3db_legacy#21

Merged

kenjis mentioned this pull request Nov 29, 2022

refactor: upgrade to PHP 8.0 with rector codeigniter4/CodeIgniter4#6923

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Create str_contains PHP function #5179

Create str_contains PHP function #5179

philippta commented Feb 13, 2020 •

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Create str_contains PHP function #5179

Create str_contains PHP function #5179

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