string - A PHP Loop question -


i'm creating script creates random security number user, , i'm looking @ ways can complete this.

i need security number 7 digits doesn't contain 0. when using rand(1111111,9999999) there still possibility of 0 being inside of number, wondering loop best check , function use check existence of 0 in string?

couldn't concat random number between 1 , 9 7 times? 

rand(1,9)

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