Print_r () function, what is the effect of the 2nd parameter?

This post was last edited by u012314326 on 2013-10-02 17:04:39

http://cn2.php.net/manual/zh/function.print-r.php

1. "Print_r () moves the pointer of the array to the last edge. Use Reset () to get the pointer back to the beginning "
What do you mean by this sentence?

2. "If you want to capture the output of Print_r (), you can use the return parameter. If this parameter is set to TRUE, Print_r () will not print the result (this is the default action), but instead return its output. ”
What do you mean by this sentence?

3. What role does this function have in actual programming?

Reply to discussion (solution)

$arr =array ("1" =>1, "2" =>2);
$result =print_r ($arr, TRUE);
echo $result;

1. "Print_r () moves the pointer of the array to the last edge. Use Reset () to get the pointer back to the beginning "

$ar = Array (' a ' = = 1, ' b ' = + 2); Echo current ($ar); 1print_r ($ar); Echo current ($ar); 1

The description is outdated.

2. "If you want to capture the output of Print_r (), you can use the return parameter. If this parameter is set to TRUE, Print_r () will not print the result (this is the default action), but instead return its output. ”

$ar = Array (' a ' = = 1, ' b ' = + 2); $s = Print_r ($ar, 1);

3. What role does this function have in actual programming?
This function is generally used in the process of debugging

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