What potential issues can arise when using strpos to locate specific characters in a string, especially when the character appears multiple times?

When using strpos to locate specific characters in a string that appear multiple times, the function will only return the position of the first occurrence of the character. This can be problematic if you need to find all occurrences of the character. To solve this issue, you can use a loop to iterate through the string and find all occurrences of the character. 

$string = "hello world";
$char = 'o';
$positions = array();

for($i = 0; $i < strlen($string); $i++) {
    if($string[$i] == $char) {
        $positions[] = $i;
    }
}

print_r($positions);

Keywords

strpos PHP string characters multiple occurrences

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