When Should You Use var_dump() vs print_r() for PHP Array String Output?

Dissecting the Differences between var_dump() and print_r() in Array String Output

In the realm of PHP, understanding the nuances between var_dump() and print_r() is crucial for effectively displaying arrays as strings. Both functions serve distinct purposes in this regard, with var_dump() providing a detailed dissection and print_r() offering a human-readable representation.

var_dump(): An In-Depth Analysis

var_dump() profoundly unveils the depths of arrays, recursively exploring their structure while showcasing the type and value of each element. Its indentation of values enhances the visualization of array hierarchy, further revealing references to array values and object properties.

print_r(): Human-Centered Display

In contrast, print_r() prioritizes human readability, delivering an array's contents in a comprehensible format. It exhibits keys and elements explicitly, utilizing a notation that efficiently represents objects.

Illustrative Comparison

Consider the following object:

$obj = (object) array('qualitypoint', 'technologies', 'India');

Running var_dump($obj) yields:

object(stdClass)#1 (3) {
 [0]=> string(12) "qualitypoint"
 [1]=> string(12) "technologies"
 [2]=> string(5) "India"
}

This output elaborately displays the type (stdClass object) of the object, along with its three properties.

Meanwhile, invoking print_r($obj) produces:

stdClass Object ( 
 [0] => qualitypoint
 [1] => technologies
 [2] => India
)

Here, the output presents a clean and readily understandable view of the object's properties.

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