PHP, is_array() generating an "Undefined property: stdClass::$crit " error

Question

is_array($src2->crit) is generating an "Undefined property: stdClass::$crit" error.

The line throwing the error is: if(is_array($src2->crit) && count($src->crit) > 0){

$src2->crit is initialized here.

$src2->crit = array();
 $src2->crit[0] = new dataSet();
 $src2->crit[0]->tblName = $tbl2;
 $src2->crit[0]->colName = "ID";
 $src2->crit[0]->val = $elm->editID;

When testing $src2->crit with this code.

print("\$src->crit is a ".$src->crit."<br />");
print_r($src->crit); print("<br />");

This is returned.

$src2->crit is a Array
Array ( [0] => dataSet Object ( [tblName] => sExam [colName] => ID [val] => 10 ) )

What am I not seeing/understanding correctly? If print("\$src2->crit is a ".$src->crit."<br />") returns that it is an array then why is is_array($src2->$crit) generating an error?

Answer 1

Can't reproduce:

<?php
$src2 = new stdClass();
$src2->crit = array();
$src2->crit[0] = new stdClass();
$src2->crit[0]->tblName = "whatever";
$src2->crit[0]->colName = "ID";
$src2->crit[0]->val = "value";
var_dump(is_array($src2->crit));

gives bool(true).

Answer 2

It appears your biggest issue (according to the info you posted in the question) is that you refencing a different varaible name?

$elm->crit
$src->crit

Answer 3

print("\$src2->crit is a ".$src->crit."<br />")

is_array($src2->$crit)

One of these things is not like the other!

One's referencing the crit property of the $src2 object.

The other is referencing the $crit property, meaning the value of the variable $crit is evaluated to a string, then that string value is used as the property name.

What's $crit defined as? I'll bet it's not the string 'crit'!