Substr

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Hi,

I have a string as follows: pid_1_date_2004_10_25

pid tells me the Project_ID and date tells me the date(!). I need to extract 
this information from the string so to get the date I need everything after 
'date_' as follows:

substr(strstr($key, 'date_'), 4)

However, to get the Project ID I need to extract everything after 'pid_' and 
everything before 'date_'. Can someone help me with this please as PHP 
doesn't seem to provide a function for extracting information from a string 
that occurs before the 'needle'? 

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