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Completion method: 1. Use the "str_pad(numeric value, 10, "0", STR_PAD_RIGHT)" statement, and use zeros to supplement less than 10 digits; 2. Use "sprintf(" f", numerical variable)* pow(10,(10-strlen(numeric variable)))" statement, any less than 10 digits are padded with zeros.
The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer
php implementation is less than 10 Method of padding the digits with 0
1. Use the str_pad() function
str_pad() function to fill the string to the new length
Use the str_pad() function to return 10 digits, and add zeros if it is less than 10 digits.
<?php echo str_pad(12853,10,"0",STR_PAD_RIGHT)."<br>"; echo str_pad(1252,10,"0",STR_PAD_RIGHT)."<br>"; echo str_pad(1283365,10,"0",STR_PAD_RIGHT)."<br>"; ?>
Description: Possible values for the fourth parameter of this function:
STR_PAD_BOTH
- Fill Both sides of the string. If it's not an even number, the right side gets extra padding.
STR_PAD_LEFT
- pads the left side of the string.
STR_PAD_RIGHT
- Pads the right side of the string. This is the default.
2. Use the sprintf() function
Use the sprintf() function to format the value and convert it to A floating point number that specifies the number of decimal places.
Then multiply the decimal by (10 to the nth power) to convert it to 10 digits
<?php $c=12345; echo sprintf("%10f",$c)*pow(10,(10-strlen($c)))."<br>"; $c=123; echo sprintf("%10f",$c)*pow(10,(10-strlen($c)))."<br>"; $c=123366; echo sprintf("%10f",$c)*pow(10,(10-strlen($c)))."<br>"; $c=1234452; echo sprintf("%10f",$c)*pow(10,(10-strlen($c)))."<br>"; ?>
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