String parsing and Array sorting

I am having trouble conceptualizing a solution to a fairly complicated (for me) string parsing exercise. The problem is I need to work with "fields" in a text string which is essentially a profile of a professional person (doctor, lawyer , etc...) So say the profile is this: John Doe the best in the world. Education: School of hard Knocks 2000 Admitted: 2001. Employment History: John Doe Inc, 2000- present Professional Associations: PTA Representative Clients: My dog Obviously this is a simplified, ficticious example. This profile will come from a database but here I'l just stuff it in a string variable for simplicity. $bio = "Me \n Education: School of hard Knocks 2000. \n Admitted: 2001. \n Employment History: none \n Professional Associations: PTA \n Representative Clients: My dog"; The "delimiters" of the text field can be put into an array as follows: $keywords[0]="Education:"; $keywords[1]="Admitted:"; $keywords[2]="Employment History:"; $keywords[3]="Professional Associations:"; $keywords[4]="Representative Clients:"; $keywords[5]="Community Involvement:"; $keywords[6]="Firm:"; Now I can loop through the text field ($bio) looking for each keyword and its position and add it to another array as follows: $i=0; $j=-1; for ($i=0;$i<=count($keywords);$i++) { $keypos = strpos($bio, $keywords[$i]); if (!$keypos === false ) { $j++; $biofields[$j][0] = $keypos; $biofields[$j][1] = $keywords[$j]; } } I can now output this and get this (in position keyword format): 3 Education: 45 Admitted: 66 Employment History: 93 Professional Associations: 126 Representative Clients: With this information I can parse through the "bio" and get each "field" if they are always in the same, static order, but in reality this is not the case. So I need to sort the array somehow or use some other method to make this flexible enough to account for any order of "keyword delimiters". Suggestions?