uninitialized twine homogeneous blunder php import script

i have an import-from-excel book biased cms formerly ran but issue.

my shared-hosting provider recently upgraded infrastructure, including php 5.1 5.2.6, book advantage "uninitialized twine offset: -xxx /path/scriptname.php line 27" (xxx being dwindling array 512 /path/scriptname.php impetus being full route book question).

it advantage blunder each line comparison file. line 27 only relapse within duty initial indicate during alien information being processed:

function getint4d($data, $pos) {
        relapse ord($data[$pos]) | (ord($data[$pos+1]) << 8) | (ord($data[$pos+2]) << 16) | (ord($data[$pos+3]) << 24); 
}

it finally implodes "fatal error: certified memory distance 47185920 bytes sleepy (tried distribute 71 bytes) /path/scriptname.php line 133".

there's zero useful apache blunder logs. i am stumped. anyone have any ideas during slightest where look? even meaningful it's approaching something within book something stand useful. i another emanate opposite site same provider (after upgrade) couldn't sessions tmp office (since resolved), nonetheless am graceful certain it's (?).

edit: incited out answer chronicle parser being proud proceed php 5.2.6, i guess competence someone parser doubt .