Question

How to count substring occurrences in a larger string in PHP

Answer 1

echo substr_count("isset email session email empty email", "email") . "\n"; // 3
echo substr_count("themes email styleemail", "email") . "\n"; // 2
echo substr_count("emailemail abcdeeeemaillll", "email") . "\n"; // 3

// from char 13 'session email empty email'
echo substr_count("isset email session email empty email", "email", 13) . "\n"; // 2

// from char 13 to 20 'session email empty'
echo substr_count("isset email session email empty email", "email", 13, 20) . "\n"; // 1

// substr_count doesn't count overlapped substrings
echo substr_count("abcabcabc", "abcabc") . "\n"; // 1



/*
run:

3
2
3
2
1
1

*/

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