How to traverse output string in php

1. First create a new PHP document and define a string, example:

$str = '百度经验作者：XCLBASE';

2. Use the built-in function strlen() to get the string length, example:

$strlen = strlen($str);

3. Define a for() loop. When $i<$strlen, execute it. Example:

for ($i=0; $i < $strlen ; $i++) {
    # code..
}

## 4. In the for() loop, print the string as an array, example:

for ($i=0; $i < $strlen ; $i++) {
    # code...
    echo $str[$i];
}

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