What should I do if php does not support bccomp?

Solution to the problem that php does not support bccomp: First execute the command "yum install php-bcmath" to install bcmath; then reload "php-fpm" and nginx.

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PHP bcsub cannot be used?

php-bcmath extension installation

Today after migrating a server, I found that a page was blank without any error. Later, after analyzing the code, I found that there was Function bcsub can be used after commenting it out.

The php-bcmath extension is required to run the bcsub function.

Php: BCMath

bc is the abbreviation of Binary Calculator. The parameters of the bc* function are all operands plus an optional [int scale], such as string bcadd(string $left_operand, string $right_operand[, int $scale]). If scale is not provided, the default of bcscale is used. value. Here, large numbers are directly represented by a string consisting of 0-9, and the calculation result is also a string.

bcadd — Add two high-precision numbers

bccomp — Compare two high-precision numbers, return -1, 0, 1

bcdiv — Add two high-precision numbers Divide precision numbers

bcmod — Find the remainder of a high-precision number

bcmul — Multiply two high-precision numbers

bcpow — Find the power of a high-precision number

bcpowmod — Find the modulus of the power of high-precision numbers, which is very commonly used in number theory

bcscale — Configure the default number of decimal points, which is equivalent to the "scale=" in Linux bc

bcsqrt — Find High-precision number square root

bcsub - Subtract two high-precision numbers

You can refer to the manual to check the application of these functions.

bcmath installation:

yum install php-bcmath

Reload php-fpm, nginx
systemctl reload nginx.service
systemctl reload php-fpm.service

Reopen the page and return to normal.

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