php - echo variable variable name

Solution:

Theoretically, you can do this.

$variablename = 'IMG' . $i;
echo $$variablename;
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or simply

echo ${IMG . $i};
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This is a PHP language feature called variable variables.

This is a really bad idea. Do not do it.

Instead, build an array.

$images = array('first', 'second', 'third');
foreach($images as $image) {
    echo $image;
}

// or

for ($i = 0; i < count($images); $i++) { // this might be what you already have
    echo $images[$i];
}
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Solution:

Your code contains syntax errors, but assuming you have a variable$arr that is your array, all you need to do isecho $arr["IMG" . $i]

Solution:

echo $arr['IMG' . $i];
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Simple as pie. I don't recommend string interpolation (using variables inside double-quotes) because of it's poor performance and security vulnerabilities.