What are the advantages and disadvantages of using strpos() and substr() functions in PHP for text manipulation?

When manipulating text in PHP, the strpos() function is used to find the position of a substring within a string, while the substr() function is used to extract a portion of a string. Advantages of using strpos() include its ability to quickly locate the position of a substring within a string, which can be useful for tasks like searching for specific words or characters. On the other hand, advantages of using substr() include its flexibility in extracting substrings based on position and length parameters. However, a disadvantage of using strpos() is that it only returns the position of the first occurrence of a substring, which may not be ideal for more complex text manipulation tasks. Similarly, a disadvantage of using substr() is that it requires specifying the starting position and length of the substring, which may be cumbersome for certain use cases.

// Example of using strpos() function
$string = "Hello World";
$position = strpos($string, "World");
echo "Position of 'World' in the string: " . $position;

// Example of using substr() function
$substring = substr($string, 6);
echo "Substring starting from position 6: " . $substring;