PHP iconv_strrpos() Function: Usage and Examples

Use iconv_strrpos() when you need to finds the last occurrence of a substring in a given character encoding in a PHP application. The examples below show the actual operation and its limitations.

What Is iconv_strrpos() in PHP?

Finds the last occurrence of a substring in a given character encoding. The exact signature supported by your installation depends on its PHP version and enabled extensions.

Its syntax is:

iconv_strrpos(string $haystack, string $needle, ?string $encoding = ...): int|false

Parameters and return value: The parameter types, optional arguments, references, and return type are shown in the signature above. Optional parameters are marked with an ellipsis in this reference signature.

Example 1: Basic Usage

<?php

echo iconv_strrpos("café café","café","UTF-8");

Output:

5

Example 2: Different Input or Behavior

<?php

echo iconv_strrpos("red blue red","red","UTF-8");

Output:

9

Practical Example: Applying the Function

<?php

$sentence = "été and été"; $position = iconv_strrpos($sentence,"été","UTF-8"); var_dump($position);

Output:

int(8)

Important Behavior and Edge Cases

Search results are character offsets; always check === false because position zero is valid.

Comparison With Related Functions

Common Beginner Mistakes

Key Takeaways

• Finds the last occurrence of a substring in a given character encoding.
• Search results are character offsets; always check === false because position zero is valid.
• strrpos() uses byte offsets; iconv_strrpos() is encoding-aware.

Use iconv_strrpos() for the specific operation demonstrated above. Check its prerequisites and handle failure conditions before using it with production data.