Validate IPv4 Address in PHP

Today I am going to tell how to validate IPv4 / IP address using PHP. Simple function which will used to check client IP address is valid or not.

Steps to validate IPv4 Address in PHP

• Split IP address into segments  by dot(.)  using explode function
• Make sure that there are 4 segments (eg : 192.168.1.45)
• Make sure that IP cannot start with 0
• IP segments must be digits & cannot be longer than 3 digits or greater than 255

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