w3resource

PHP : debug_zval_dump() function

Description

The debug_zval_dump() function is used to dump a string representation of an internal zend value to output.

Version:

(PHP 4 and above)

Syntax:

debug_zval_dump (var_name)

Parameter:

Name Description Required /
Optional
Type
var_name The variable being evaluated Required Mixed*

*Mixed: Mixed indicates that a parameter may accept multiple (but not necessarily all) types.

Return value:

No value is returned.

Example:

<?php
$var_name1='w3resource.com';
$var_name2='';
$var_name2=& $var_name1;
debug_zval_dump(&$var_name1);
?>

Output:

&string(14) "w3resource.com" refcount(3)

View the example in the browser

Practice here online :

See also

PHP Function Reference

Previous: Installing and configuring PHP Variable Handling
Next: doubleval



PHP: Tips of the Day

SQL injection that gets around mysql_real_escape_string()

Consider the following query:

$iId = mysql_real_escape_string("1 OR 1=1");    
$sSql = "SELECT * FROM table WHERE id = $iId";

mysql_real_escape_string() will not protect you against this. The fact that you use single quotes (' ') around your variables inside your query is what protects you against this. The following is also an option:

$iId = (int)"1 OR 1=1";
$sSql = "SELECT * FROM table WHERE id = $iId";

Ref : https://bit.ly/32q3bJ7