How can preg_replace be used to correct occurrences of lowercase followed by uppercase letters in a string in PHP?

When dealing with occurrences of lowercase letters followed by uppercase letters in a string in PHP, we can use the preg_replace function with a regular expression to correct them. By using a regular expression pattern that matches lowercase letters followed by uppercase letters, we can then replace them with the desired format. This allows us to easily correct the formatting issue in the string. 

$string = "thiS iS a Test sTring";
$corrected_string = preg_replace('/([a-z])([A-Z])/', '$1 $2', $string);

echo $corrected_string;
// Output: "thiS iS a Test String"

Keywords

preg_replace lowercase uppercase string PHP

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