Cheatography
https://cheatography.com
This Cheat Sheet was created with these versions in mind :
PHP 8.2
Symfony 6.3
This is a draft cheat sheet. It is a work in progress and is not finished yet.
Truthy & Falsy
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Everything else |
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""
(empty string) & "0"
(string zero) |
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Operators
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?: |
$var = expr1 ? expr2 : expr3;
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if (expr1 = true) {
$var = expr2
else
$var = expr3
}
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$var = expr1 ? expr1 : expr2;
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?? |
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$var = isset(expr1) ? expr1 : expr2
Note : isset($var) returns false when $var is not set or null |
PHPMD, PHPSTAN snippets
PHPMD Suppress Warnings
Comment annotations on a class or a method |
/**
* @SuppressWarnings(PHPMD.LongVariable)
* @SuppressWarnings(PHPMD.UnusedLocalVariable)
*/
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match() expression
The match() expression branches evaluation based on an identity check of a value. Unlike switch, it will evaluate to a value much like ternary expressions. Unlike switch, the comparison is an identity check (===) rather than a weak equality check (==). |
$food = 'cake';
$return_value = match ($food) {
'apple' => 'This food is an apple',
'bar' => 'This food is a bar',
'cake' => 'This food is a cake',
};
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Run a command
run a generic symfony command : |
php bin/console app:test
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run a command giving PHP more memory |
php -d memory_limit=2G bin/console ...
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DB related commands
Make a migration |
php bin/console make:migration |
Migrate (apply migrations) |
php bin/console doctrine:migrations:migrate |
Apply only a specific migration (dry-run) |
php bin/console doctrine:migrations:execute --dry-run 20240502113013 |
Apply only a specific migration |
php bin/console doctrine:migrations:execute 20240502113013 |
Undo a specific migration |
php bin/console doctrine:migrations:execute --down 20240502113013 |
Run a mySQL command |
php bin/console doctrine:query:sql "SELECT * FROM table" |
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