Description:
------------
Enabling the SAM extension causes problems for users due to the following code:

PHP_RINIT_FUNCTION(sam)
{
    if (zend_eval_string("require_once(\"SAM/php_sam.php\");", NULL, "sam_factory" TSRMLS_CC) != SUCCESS) {
        /* set the standard error no for unsupported protocol   */
        return FAILURE;
    }
    return SUCCESS;
}

A user who ends up enabling this PECL extension (for example, via the PHP installer) ends up with problems especially users who simply install a lot of PECL extensions because they can (the newish installer makes this so easy).

This could be a documentation problem? The php_sam.php file exists in pecl/sam/ but... something needs to be done here as this doesn't feel right. AFAICT, a person must hunt this file down from pecl/sam/, stick it in a SAM/ that's available in include_path, and then it'll work.

I just now helped a user solve this and notice this problem comes up from time to time all over the web.

Reproduce code:
---------------
<?php echo 'oh sam...'; ?>

Expected result:
----------------
oh sam...

Actual result:
--------------
PHP Warning:  require_once(SAM/php_sam.php): failed to open stream: No such file
PHP Fatal error:  require_once(): Failed opening required 'SAM/php_sam.php'