print_r function in PHP

Sometimes it is useful to output debugging information about a variable. print_r can help with that. 


print_r function takes two arguments. First one is the text to be displayed, it is a variable that contains a text to be displayed. And the second argument is either 0 or 1. Second argument indicates that first variable contains preformatted HTML text, if it is so, than the value needs to be set to 1 or true.

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