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Update 05-variables.md
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bdsl authored Jul 26, 2023
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{% block body%}

Variables in PHP always have a dollar sign `$` at the start of their names, and you declare a variable by assigning a
Variables in PHP always have a dollar sign like `$` at the start of their names, and you declare a variable by assigning a
value to it. PHP *interpolates* double-quoted strings with variables. Edit hello.php to use a variable:

```php
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echo "The population of Earth is {$planetPopulations['Earth']}.\n";
```
{% endblock %}
{% endblock %}

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