php> print(array(1,2,3))

PHP Notice:  Array to string conversion in 
/usr/local/lib/python2.7/dist-packages/phpsh/phpsh.php(591) :
eval()'d code on line 1
Array

<?php
    $stuff = array(1,2,3);
    print $stuff;  //PHP Notice:  Array to string conversion in yourfile on line 3
?>

http://php.net/foreach

$stuff = array(1,2,3);
foreach ($stuff as $value) {
    echo $value, "\n";
}

Output:

1
2
3

Or contain array key name:

$stuff = array('name' => 'Joe', 'email' => 'joe@example.com');
foreach ($stuff as $key => $value) {
    echo "$key: $value\n";
}

Output:

name: Joe
email: joe@example.com

Note that array elements can also be arrays. In this case, you can use foreach again or use array syntax to access the inner array elements, like $row['name']

Correction method 2: Connect all cells in the array together:

If it is just an ordinary one-dimensional array, you can use the delimiter to concatenate all cells into a string:

<?php
    $stuff = array(1,2,3);
    print implode(", ", $stuff);    //输出 1, 2, 3
    print join(',', $stuff);        //输出 1,2,3

Correction method 3: Convert array of complex structure to string:

If your array has a complex structure but still need to convert it to a string, you can use http://php.net/json_encode

$stuff = array('name' => 'Joe', 'email' => 'joe@example.com');
print json_encode($stuff);

Output:

{"name":"Joe","email":"joe@example.com"}

Quickly view the array structure: use the built-in php function

If you just want to inspect the array contents for debugging purposes, you can use one of the following functions. Keep in mind that var_dump is the most verbose of them all and is usually preferred for this purpose

• http://php.net/print_r
• http://php.net/var_dump
• http://php.net/var_export

Example:

$stuff = array(1,2,3);
print_r($stuff);
$stuff = array(3,4,5);
var_dump($stuff);

Output:

Array
(
    [0] => 1
    [1] => 2
    [2] => 3
)
array(3) {
  [0]=>
  int(3)
  [1]=>
  int(4)
  [2]=>
  int(5)
}

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