I would like to search for a keyword in a large text content and output this line. My example text are as follow:
HSPICE simulation methods for the nestlist of the proposed RTD-based nanoarchitecture in order to verify a candidate of image functions by using the afore-mentioned representation methods.
Categories and Subject Descriptors: C.5.4 [Computer System Implementation]: VSLI Systems
General Terms: Design Additional Key Words and Phrases: VLSI, quantization, color extraction, color image processing, resonant-
tunneling diode(s), cellular neural network
ACM Reference Format:
And finally I want to just output "general terms: Design Additional Key Words and Phrases: VLSI, quantization, color extraction, color image processing, resonant-" by searching key word "general terms". How Can I code in PHP get this result? For whole text let it be $content, and $key="General Terms";