What is the use of echo,print,print_r,var_du in php7

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Let's talk about the difference of echo,print,print_r,var_dump in php7.

1.echo

Outputs one or more strings.

2.print

The main difference from echo: print supports only one parameter and always returns 1.

3.print_r

Print easy-to-understand information about variables, and if string, integer, or float are given, the variable values themselves are printed. If array is given, the keys and elements will be displayed in a certain format. Object is similar to an array. Remember, print_r () will move the pointer of the array to the end. Use reset () to get the pointer back to the beginning.

4.var_dump

This function displays structural information about one or more expressions, including the type and value of the expression. The array will recursively expand the value and show its structure by indentation.

The difference between 5.var_dump and print_r

Var_dump returns the type and value of the expression, while print_r only returns the result, which is easier to read than debugging code using var_dump

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