What to do if php loses focus

Solution to PHP losing focus: 1. Use the "onblur = "functionName()";" method; 2. Define a method "function functionName(){}" and go to the relevant PHP page to call the relevant method That’s it.

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php How to execute a php function when the focus is lost?

1. Binding event: onblur = "functionName()"; //Here is the method of binding the out-of-focus event. Write functionName() in JS

2. Definition method:

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