PHP print output array content and structure function Print_r and var_dump

PHP print output array content and structure function Print_r and var_dump

Print_r () function

Example:

<?php  $arr _test =array (1, 2, 3); Print_r ($arr _test);? >

Run the example output:

Array (  [0] = 1     [1] = 2     [2] = 3)

Var_dump () function

Example:

<?php$arr_test = Array (1, 2,3); Var_dump ($arr _test);? >

Run the example output:

Array (3) {  [0]=> int (1) [1]=> int (2) [2]=> int (3)}

The Var_dump () function is the same as the Print_r () function usage. However, the Var_dump () function is more powerful than print_r () and can print multiple variables at the same time and give the type information of the variables.

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