Describe functions STRSTR() and STRISTR.
Answer
Both the functions
are used to find the first occurrence of a string. Parameters includes: input
String, string whose occurrence needs to be found, TRUE or FALSE (If TRUE, the
functions return the string before the first occurrence.
STRISTR is similar to STRSTR. However, it is case-insensitive
E.g. strstr ($input_string, string)
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