ctype_lower

Supported Versions: PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8

Check for lowercase character(s)

<?php ctype_lower(mixed $text): bool

laravel/framework

<?php             return static::$snakeCache[$key][$delimiter];

        }



        if (! ctype_lower($value)) {

            $value = preg_replace('/\s+/u', '', ucwords($value));



            $value = static::lower(preg_replace('/(.)(?=[A-Z])/u', '$1'.$delimiter, $value));

src/Illuminate/Support/Str.php

pestphp/pest

<?php     public function toBeLowercase(string $message = ''): self

    {

        Assert::assertTrue(ctype_lower((string) $this->value), $message);



        return $this;

    }

src/Mixins/Expectation.php