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level1=1

print_r($input->post->level1)

return [level1] = 1

level1[level2] = 1

print_r($input->post->level1)

return [level1][level2] =1

level1[level2][level3] = 1

 
print_r($input->post->level1)
return null
 
 
how to fix it!?
 
processWire 2.4

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if you assign level1 = 1 and then try to print an array i doubt it will work since you assigned an int or even a bool (Since 1 could also be true) and you try to print an array

If you wish to print it should work with $level1 = array(1);

That and i dont really understand your question, try and formulate your question instead of just stating a line and another line.

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