This question already has answers here:
PHP Foreach Pass by Reference: Last Element Duplicating? (Bug?) [duplicate]
(6 answers)
Why php iteration by reference returns a duplicate last record?
(1 answer)
Closed 9 years ago.
Friend posted this PHP snippet.
<?
$a=array(1,2,3);
foreach ($a as &$item){}
foreach ($a as $item){}
print_r($a);
The output is 1,2,2 - why?
Related
This question already has answers here:
PHP printed boolean value is empty, why?
(4 answers)
Why doesn't PHP print TRUE/FALSE? [duplicate]
(3 answers)
Closed 3 years ago.
Using == vs Using !=
/*Testing some basic scenarios in PHP*/
$a=7;
$b=5;
echo $a==$b;
$a=7;
$b=5;
echo $a!=$b;
Output is blank screen in case 1.
Output is 1 in case 2
.Why am I getting these respective outputs?
This question already has answers here:
Remove empty array elements
(27 answers)
Closed 5 years ago.
I have been trying array_filter but doesn't work on my part.
If you want is to remove empty arrays inside an array, you can use this
$array= array_filter(array_map('array_filter', $array));
This question already has answers here:
Shuffle an array in PHP
(6 answers)
Closed 5 years ago.
Is there a simple way to get the result of this foreach loop shuffled on output at each page load?
foreach(glob('images/fotoalbum/*.*') as $file)
you can't shuffle after output but you can before.
try this
$dir=glob('images/fotoalbum/*.*');
shuffle($dir);
foreach($dir as $file){
//operation here
}
This question already has answers here:
How to loop through PHP object with dynamic keys [duplicate]
(16 answers)
How to extract and access data from JSON with PHP?
(1 answer)
Closed 5 years ago.
I want to get the URLS from the JSON below.
$jsonArray = {
"uuid": "signed",
"PreSigned": "{'url': ['www.g.com', 'www.o.com']"}
I tried this $jsonArray -> PreSigned[0]->url
And it didn't work
This question already has answers here:
Is foreach guaranteed to iterate in the array order in php?
(4 answers)
How does PHP 'foreach' actually work?
(7 answers)
Closed 6 years ago.
I know that I can use this to iterate on an object:
foreach ($this as $key => $value) {
print "$key => $value\n";
}
Is the order in which the properties are looked over always the same or is it random?
I tried it a bit and it seems to always follow the declaration order, as in the exemple from here: http://php.net/manual/en/language.oop5.iterations.php
But I couldn't find any documentation where this is formally specified.
Can an experimented PHP dev confirm or disconfirm what I found in my trials?