How to concatenate strings in PHP?

@arnoldo.moen 

In PHP, there are several ways to concatenate strings:

1. Using the "." (dot) operator: The dot operator is used to concatenate two or more strings together. Here's an example:

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$name = "John";
$age = 25;
echo "My name is " . $name . " and I am " . $age . " years old.";

This will output: "My name is John and I am 25 years old."

1. Using the "." (dot) equals operator: This operator is used to concatenate a string to an existing string variable. Here's an example:

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$name = "John";
$name .= " Smith";
echo $name;

This will output: "John Smith"

1. Using double quotes: Double quotes can be used to concatenate strings and variables. Here's an example:

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$name = "John";
echo "My name is $name.";

This will output: "My name is John."

1. Using the sprintf function: The sprintf function is used to format strings. Here's an example:

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$name = "John";
$age = 25;
$string = sprintf("My name is %s and I am %d years old.", $name, $age);
echo $string;

This will output: "My name is John and I am 25 years old."

These are some of the ways to concatenate strings in PHP.