How to Extract Data After an Underscore in a String?

How to Retrieve Data After a Specific Character in a String?

Given a string that consistently starts with numbers followed by an underscore character, the goal is to retrieve the rest of the string after the underscore. Here's how to accomplish this task:

1. Identify the Position of the Underscore: Utilize the strpos() function to find the position (offset) of the underscore character in the string.
2. Substring Extraction: Employ the substr() function to extract the portion of the string after the underscore. Specifically, specify the offset of the underscore plus one as the starting index.

For instance, with the string "123_String," the strpos() function returns 3 (the position of the underscore). Then, substr() is invoked as follows:

$whatIWant = substr($data, strpos($data, "_") + 1);

This line assigns the value "String" to the $whatIWant variable.

3. Optional Existence Check: If desired, you can verify the existence of the underscore character before retrieving data. To do this, you can use the following code:

if (($pos = strpos($data, "_")) !== FALSE) {
    $whatIWant = substr($data, $pos+1);
}

In the above example, the code checks if the strpos() function returns a value other than FALSE (indicating the underscore is found). If so, it proceeds to retrieve the data after the underscore.

4. Retrieve Requested Data: Finally, the value of $whatIWant contains the desired data after the underscore.

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