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trait_exists

Description

The trait_exists of Class / Object for PHP checks if the trait exists.

Syntax

trait_exists(
    string $trait,
    bool $autoload = true
): bool

Parameters

trait

Name of the trait to check.

autoload

Whether to autoload if not already loaded.

Return

Returns true if trait exists, and false otherwise.

Examples

1 · trait

<?

trait mytrait
{
}

$trait = "mytrait";

$return = trait_exists($trait);

var_export($return);

true

2 · autoload · false

<?

trait mytrait
{
}

$trait = "mytrait";
$autoload = false;

$return = trait_exists($trait, $autoload);

var_export($return);

<!doctype html>
<html>
<body>
    <img src="data:image/png;base64,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">
</body>
</html>

3 · autoload · true

<?

trait mytrait
{
}

$trait = "mytrait";
$autoload = true;

$return = trait_exists($trait, $autoload);

var_export($return);

true