How can the strtr function in PHP be utilized?

The strtr function in PHP is used for string replacement, which allows for replacing specified characters or strings in a string with another character or string. Its syntax is as follows:

strtr(string $str, array $replace)

In this case, $str is the string that needs to be replaced, and $replace is an associative array where the keys represent the characters or strings to be replaced and the values represent the replacements.

原句：我今天晚上会跟朋友去看电影。
Paraphrased: I will go see a movie with friends tonight.

$str = "Hello World";
$replace = array("Hello" => "Hi", "World" => "PHP");
$newStr = strtr($str, $replace);
echo $newStr; //输出：Hi PHP

In this example, a string $str is first defined as “Hello World”, then an associative array $replace is defined with keys “Hello” and “World” and values “Hi” and “PHP” respectively. Finally, the strtr function is used to replace “Hello” with “Hi” and “World” with “PHP” in $str, and the replaced result is assigned to $newStr and printed out.