The very essential 100 PHP functions that you have to know. Click on the link to go to the documentation. Some insight at the bottom of the top 100 PHP functions. Sl. Function Frequency Average 1 count 81.41 % 147.67 2 is_array 77.32 % 117.86 3 substr 74.62 % 142.92 4 in_array 74.16 % 79.55… Continue reading Very essential 100 PHP functions