Code snippets

You will find here 13 code snippets I find useful so I don't have to Google ™ or Stackoverflow ™ them when I need. There are also code snippets I always forget! 😁 Sometimes, related links to the code will be available. The main difference with other random snippets you will find on the web is that in most cases (for the Symfony related ones) you will be able to run them directly from this website to check the output so you can verify it works as expected ™.

This snippet shows how to check if a string contains valid JSON with PHP. This function was introduced in PHP 8.3 to avoid using j...

PHP

Published on 2024-02-07 • Modified on 2024-02-07

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In a previous snippet, we saw a (ugly) hack to convert a string variable to an integer. Here, we validate with the multi-purpose ...

PHP

Published on 2024-01-19 • Modified on 2024-01-19

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In a previous snippet, we saw how to validate an array using the existing validator service manually. In this snippet, we manuall...

Symfony

Published on 2023-08-09 • Modified on 2023-08-09

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This snippet shows how to unit test a Symfony custom constraint with the ConstraintValidatorTestCase. In the previous snippet, we ...

Symfony

Published on 2022-11-06 • Modified on 2022-11-06

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This snippet shows how to unit test a custom Symfony validation constraint. One learns every day; I made this snippet inspired by ...

Symfony

Published on 2022-11-05 • Modified on 2022-11-05

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This snippet shows how to select an invalid choice value of a select form field in a Symfony functional test. Indeed, if you try t...

Symfony

Published on 2022-08-19 • Modified on 2022-08-19

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In this snippet, we see how to validate array keys type and presence with the Symfony validator component. This is straightforward...

Symfony

Published on 2021-08-07 • Modified on 2021-08-07

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In this snippet, we will see how to check if a French SIRET number is valid with the Luhn algorithm. Check out the Wikipedia page ...

algorithm

Published on 2020-09-24 • Modified on 2020-09-24

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In this snippet, we will see how to mark with an asterisk all the required fields of a Symfony form. We will do it with CSS. Inspe...

Symfony

Published on 2020-08-25 • Modified on 2020-08-25

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Sometimes it's useful to know if a form is valid inside a Twig template. Indeed, when using the form_ helpers like form_error all ...

Symfony

Published on 2019-07-23 • Modified on 2019-11-08

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